Modified path to Phidgets C API header file
phidgets_c_api merged into phidgets_api; dependencies updated
phidgets_c_api merged into phidgets_api; CMakeLists.txt updated to reflect merge
Added git ignore file to avoid pushing C API to repo
udev rule setup file now resides in phidgets_api due to merge with phidgets_c_api
Metapackage definition updated to reflect merge of phidgets_c_api with phidgets_api
phidgets_c_api package has been merged into phidgets_api