renamed convert/parse/construct commands
fix README
change ma-length-of-line to 120
Merge pull request #32 from niyaton/fix-pep8-max-length-of-line

change ma-length-of-line to 120
followed PEP8: pull_up_method.py
followed PEP8: extract_method.py
followed PEP8: pull_up_method.py
followed PEP8: shingles.py
followed PEP8: shingles_test.py
followed PEP8: submodule.py
followed PEP8: exc.py
followed PEP8: util.py
followed PEP8: parser.py
followed PEP8: diff.py
followed PEP8: distiller.py
followed PEP8: pull_up_method
followed PEP8: tree_contents.py
followed PEP8: convert.py
followed PEP8: convertor.py
followed PEP8: committer.py