Add /etc/kraftwagenrc.php to the default config
Add ./cnf/kraftwagenrc.php to the user context
Copy kraftwagenrc.php from ./src/cnf to ./cnf on kw-s
Merge pull request #33 from FransvanderMeer/kraftwagenrc_vc

Allow kraftwagenrc.php to be under version control
addslashes for generating src_dir in make file, for Windows compatibility
symlink is destroyed after moving from tmp folder by drush.
fix logic and ln command.
fix code style. Switch functions to drush API.
Fixed arguments for kraftwagen_symlink.