Merge pull request #4 from zpbx/release

Release v0.2.0.
Add license info.
Use external dependency instead of local css file.
Merge pull request #5 from zpbx/dev

Use external dependency instead of local css file.
Loose jQuery version in bower config.
Merge pull request #6 from zpbx/bower

Loose jQuery version in bower config.
Release v0.2.1.