Add the option 'mp3' to the format switch (-f / --format) if LMMS is
compiled with MP3 support. Add the new switch 'mode' which can be used
to set the stereo mode used for the MP3 export.
Adjust the man page for the new options.
* Fix command-line help, add --config option and use local lmmsrc file in dev mode
* Fix a typo in help screen for option --geometry (second dash missing)
* Replace tabs with spaces in help screen
Update man page
* Lineup items in help screen
* Accept both -geometry and --geometry as valid options
The AUTHOR block was formatted using fixed with font and no line
break by mistake. Change this to normal text formatting.
The problem was discovered by Debian thanks to lintian, and is fixed
there in using a local change in debian/patches/man-page-adjustment.patch.
Cleans up the root directory of the GitHub source tree and starts to separate platform-specific installing and packaging logic from the master CMakeLists.txt. Closes#2201
