fix README
Merge pull request #24 from umr00/fix-README

fix README
fixed behavior if caulculate_similarity takes empty script.
fixed regex for spliting literals
Merge pull request #28 from niyaton/fix-shingles

Fix shingles
[TravisCI] use pep8
Merge pull request #29 from niyaton/check-pep8

[TravisCI] use pep8
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