removed the following environment variables:

removed the following environment variables:

	ARDOUR_GLADE_PATH
	ARDOUR_RC
	ARDOUR_UI
	ARDOUR_UI_RC
	ARDOUR_BINDINGS
	ARDOUR_COLORS

They have been replaced with just one environment
variable called ARDOUR_PATH which can contain a number
of colon separated paths that are used to find various
configuration and data files. Files located in
ARDOUR_PATH have priority over files in ~/.ardour/ and
in the system path.

Moved two member functions of the Configuration class
into globals.cc as they should of been static and I'm
trying to keep the non-portable code together when it
makes sense.

git-svn-id: svn://localhost/trunk/ardour2@380 d708f5d6-7413-0410-9779-e7cbd77b26cf