Add support for more github urls styles

[yakky]

Description

Extend parse regexp and formats to support the following urls

• git@github.com/nephila/giturlparse
• git@github.com/nephila/giturlparse/
• git@github.com/nephila/giturlparse.git/

References

Fix #33

Checklist

• [x] Code lint checked via inv lint
• [x] Tests added

[coveralls]

Pull Request Test Coverage Report for Build 1375428201

• 2 of 2 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.03%) to 92.578%

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Totals
Change from base Build 1375331442:	0.03%
Covered Lines:	190
Relevant Lines:	202

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💛 - Coveralls