implemented is-ancestor for git 1.8+
is_ancestor taking one more parameter
[TASK] Renamed README to README.md to support Markdown syntax
Reformat README.md to make usage of Markdown elements
Renamed NEWS to NEWS.md
Make usage of Markdown in NEWS.md
PEP8 compliance
Added .idea t .gitignore file
Merge pull request #11 from linzhp/feature/is_ancestor

implemented is-ancestor for git 1.8+
Merge pull request #12 from andygrunwald/readme-md

Reformat README to make usage of Markdown elements
Merge pull request #13 from andygrunwald/news-md

Reformat NEWS to make usage of Markdown elements
Merge pull request #14 from andygrunwald/pep8

PEP8 compliance
Merge pull request #15 from andygrunwald/pycharm

Added .idea to .gitignore file to work with PyCharm IDE