awesome: Minor cleanup in rc.lua before renaming.
awesome: Create generic loader for different versions.
awesome: Fix a few minor things for the 3.5 version.
awesome: Add rc.lua for v3.4.
awesome: Remove some dead code from v3.4.
awesome: Unify the 3.4 and 3.5 configs a bit more.
Merge branch 'backport_to_awesomewm_3.4'

This branch adds support for awesome 3.4. The correct rc.lua should be
loaded depending on which version of awesome is installed.