Finally adding theme support for Elm_Code_Widget. Fairly
self-explanatory. Settings-> Display -> Choose theme. Work
from both myself and Andy Williams on this one. A good one!
with having them people can just specify where the clang stuff is
installed, if its not possible to find it in the default location.
This fixes a bug where clang was not found, dirs: is meant as exclusive
parameter, so if you specify there a custom directory, then only THIS
specific directory will be used for the search. This fixes also that bug
and only specifies that argument if a custom location is given.