Mnemonic to make console output more readable

The console output for extension is not really readable. Example:

— ALIAS EXTENSIONS
...aq: taq paq iaq saq sdaq laq raq rpraq rpeaq rraq rcaq – and-quit: Launches
the command and closes the shell on successful termination. On error the
shell is turned red and beeps for attention.

Usually you just want just enough information to remember, what a command does. If more information is required, the user may follow the link that is displayed at the end of the help.

The output should be shortened to this:

— ALIAS EXTENSIONS
...aq (... and quit!): taq paq iaq saq sdaq laq raq rpraq rpeaq rraq rcaq

The Maven report will contain the detailed information.

To accomplish this the XSD will add a small attribute called 'mnemonic' to the comment element of an extension. This mnemonic will be displayed as given in brackets as shown above. It will also be shown on the report.