文档更新，请参见：http://toughradius.readthedocs.org/en/latest/
....

Merge branch 'master' of github.com:jamiesun/ToughRadius

Conflicts:
	docs/build/doctrees/environment.pickle
	docs/build/doctrees/index.doctree
	docs/build/html/_sources/index.txt
	docs/build/html/index.html
	docs/build/html/searchindex.js
	docs/source/index.rst
	docs/source/release.rst