added test_client_read_write impl, refactored p4_client_read/write functions in p4wrapper. Started test_changelists impl
Renamed p4_config class, started writing parser for changelists
Added p4_files to wrapper with test
Added p4_sync to p4_wrapper with simple test
Added doxygen comments for p4_config, p4_init
Added static state to p4_wrapper