This kind of template must be created in one of phase1, phase2, phase3 and
phase4 dir.
Each plugin ereditate variables from parent script (or subshell).
Plugin name must be a valid bash function name (i.e. don't use - or ! etc...)
 

For each plugin can be created following function:
Name		: syntax_<plugin-name>
Description	: output of --help 

Name            : parse_param_<plugin-name>
Description     : Parse command line parameters.
Return values	: Must return 1 if there's no error and SHIFT variable
                  must contain number of parameters used (1 or 2).
                  On error must return -1, STRERROR variable must contain
                  error message. USCITA must contain proper exit code, but
                  if not defined MP3do will return a 1000 error code.

Name            : begin_<plugin-name>
Description     : action to perform at beginning of phase

Name            : end_<plugin-name>
Description     : action to perform at the end of phase

Name		: sanity_check_<plugin-name>
Description	: Sanity check to perform after MP3do's parameter parsing.

For examples see plugins already in phase[1234] dirs. They are very easy to 
understand.


