Merge pull request #166 from xbreezes/master

Fix #165
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Added Gitter badge
Merge pull request #170 from gitter-badger/gitter-badge

Add a Gitter chat badge to README.md
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md
Create .travis.yml
Update README.md
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Fix #169
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Merge pull request #2 from b3log/master

merged with newer