Developer TODO list:

Priority A (should be done ASAP)

	*   FIXME: Numbers that are too big to be displayed can still
		sit in the memory or in the registers without
		being displayed

Priority B (should be done someday) 

	*   Option for arc-hyp autorelease

	*   Algebraic mode: operations with constants invoked by double 
	    pressing of binary operation buttons.

	*   Qt frontend

	*   Code cleanup including:
		
		+ saner constant names

		+ saner function names

Priority C (may be someday)

	*   HEX mode. It is going to be a separate program, because of the 
    	    small overlap between the functionality required for decimal and 
    	    hexadecimal calculations. 

	*   Saving of all operations somethere; their output by demand.

	*   Grads (angle measure). Is anybody using them?

