2002/03/09 Calcoo 1.3.7

	* Changed: error handling. Now all the buttons except for undo
	           and clear_all become grayed out when an error occurs.

	* Fixed:   a bug in the initialization sequence, which could cause
	           weird things displayed in the operation displays in
		   the algebraic mode from the calcoo start until the
		   first operation

	* Fixed:   a minor bug in the mode switching procedure, which 
	           could cause weird things displayed in the operation 
		   displays in the algebraic mode from just after 
		   switching from RPN to algebraic mode until the
		   first operation

	* Changed: Minor code cleanups

2002/02/09 Calcoo 1.3.6

	* Added:   option to choose between infinite and four-element
	           stack in RPN mode
	
	* Added:   option to disable autorelease of arc and hyp buttons

	* Changed: RPN-related options are now grayed out when the
	           algebraic mode is chosen

	* Added:   Shortcut Ctrl-q for exit

	* Changed: Minor code cleanups
	
2002/01/20 Calcoo 1.3.5

	* Fixed:   cpu->curr_mem was not initialized at startup, which
	           caused crashes on some systems. Thanks to Christian
	           Weisgerber for discovering this bug.
	
2001/12/14 Calcoo 1.3.4

	* Changed: RPN mode: behavior of the <Enter> button
	           Finally calcoo can satisfy all tastes for the
		   behavior of the <Enter> button. Now there is an option
		   that sets its behavior to traditional or HP-28-like.

2001/12/10 Calcoo 1.3.3 (for Debian GNU/Linux only)

	* Changed: RPN mode: behavior of the <Enter> button
	           Now it works like in most HP calculators. (In 1.3.2
		   it was set to work as in HP-28, which was not quite
		   standard).

	* Added:   keyboard shortcuts for parenthesis buttons
	
2001/12/3 Calcoo 1.3.2

	* Fixed:   RPN mode: behavior of the <Enter> button pressed
	           when the number has just been entered

	* Changed: now options and info/help have separate windows

	* Changed: code cleanups

	* Added:   engineering display format (the exponent is 
	           a multiple of 3)

	* Fixed:   incorrect behavior when "=" is pressed before all parens
		   are closed

	* Fixed:   adjacent opening parens are now possible

	* Fixed:   GtkErrors if the options applied are the same as the
	           current ones
	
	* Added:   "Help" tab in the info window

	* Changed: register X is not reset by changing the mode now
	
2001/11/19 Calcoo 1.3.1

	* Changed: body design, button arrangement

	* Fixed:   RPN mode: the bugfix of the previous version introduced
	           another bug - sometimes the stack was pushed twice.

	* Added:   displays for Y, Z, and T registers

	* Changed: the number of registers in RPN mode reduced from
	           infinity to 4 to comply with traditions

	* Changed: rearrangements in processing binary operations, digit
	           keys, and parentheses

	* Added:   more shortcuts
	
2001/11/16 Calcoo 1.3.0

	* Changed: body design, button arrangement

	* Fixed:   RPN mode: in earlier versions entering of a new number
	           did not push the stack. Thanks to Christian Weisgerber
	           for finding this bug.

	* Fixed:   PRN mode: in earlier versions recalling from the memory
	           did not push the stack.

	* Added:   a button to swap X and memory registers

	* Added:   another memory register
	
	* Added:   displays for memory

	* Changed: icons for memory buttons

	* Removed: optimization and other flags from configure.in
	
2001/11/13 Calcoo 1.2.4

	* Fixed:   a nasty bug introduced in version 1.2.2, which 
	           caused crashes when display was getting full

	* Changed: pixmaps for digit "1" (thanks to Daniel Richard G.) 

	* Added:   more keyboard shortcuts (thanks to Daniel Richard G.) 
	
2001/11/11 Calcoo 1.2.3

	* Added:   the state of RPN/Standard option is now saved in
	           $HOME/.calcoo, and is restored when calcoo is restarted

	* Added:   keyboard shortcuts for basic buttons

	* Added:   help tab in the info window

	* Changed: information about the current state of "enforced e
	           format" and deg/rad is now stored in "cpu"; as a 
	           result now it is affected by undo/redo

	* Fixed:   tan of 90 degrees now yields overflow instead of a large
	           number 

	* Fixed:   undo/redo in the previous versions did not affect memory -
	           now it does

	* Changed: code cleanups, rearrangements in the cpu structure

	* Changed: the icon for the RPN "Enter" button
	
	* Changed: now 0! yields 1 instead of overflow
	
2001/10/20 Calcoo 1.2.2

	* Changed: defaults moved to default.h

	* Fixed:   handling of binary operation priority in complicated
	           expressions improved

	* Changed: behavior of "copy": decimal dot is now not copied
	           is there is no fractional part
	
	* Changed: behavior of "copy": overflow message is now copied
	
2001/10/16  Calcoo 1.2.1

	* Changed: now switching between RPN/standard modes resets registers

	* Changed: zero exponent is not displayed now, even if exponential 
	           format is enforced

	* Changed: evaluation of trigonometric functions tweaked to have 
	           cosine of 90 degrees equal to 0.0 rather than to 10e-17 
	           and so on

	* Added:   man page

	* Fixed:   bug in the evaluation of the factorial of large numbers
	
	* Added:   main window icon

	* Added:   --help and --version command-line options

	* Added:   display tick marks to separate thousands

2001/10/13  Calcoo 1.2.0

	* Added:   RPN (reverse Polish notation) mode

	* Changed: appearance of the "Enforce exponential format" control

	* Changed: bitmaps for digits "5" and "1"
	
2001/07/20  Calcoo 1.1.1

	* Changed: icons for some buttons

	* Added:   frame for DEG/RAD indicator
	
2001/07/13  Calcoo 1.1.0

	* Added:   copy/paste interaction with X clipboard

	* Added:   parentheses buttons

	* Added:   binary operation priority

	* Removed: M-, MX, M/ buttons

2001/06/20  Calcoo 1.0.1

	* Added:   tooltips for non-obvious buttons

	* Added:   autoconf/automake stuff

	* Other:   minor cosmetic changes

2001/06/15 Calcoo 1.0.0
	
