Allow missing appauthor to fall back to appname.
Issue #11: Allow optional appname for root dir.
Add default value to 'appauthor' on wrapper.
Merge remote-tracking branch 'origin/appauthor-fallback'
Merge remote-tracking branch 'origin/wrapper-defaults'
Merge remote-tracking branch 'origin/root-directories'

Conflicts:
	lib/appdirs.py