Bugfix for bare "Local Path" repositories

If a project is configured as hosted in "Local Path" and the repository is bare, the build process
did not create a folder to contain the working tree (causing the tar extraction to fail). This is fixed by
adding a mkdir-command.

Furter, the configuration file was never loaded for bare repositories, thereby causing every build
to fail. Calling handleConfig should fix the problem.

Tested on Debian 7.1 using Apache 2.