Added a test for running the lzma program that is not under PATH
Fixed the running an lzma program that is not under PATH
Merge pull request #65 from alquerci/fixed-lzma-program-path

Fixed the running a lzma program that is not under PATH
Use the program usage of the argparse Python module on a parse error
`parse_rc` now parse all configuration
Clarified the steps on `CygAptMain.main` method