First commit
Add README.md
Modfied Demo page description.
Chagne title
Add prefiew-file.html
Add github.css for markdown.

This github.css was downloaded from https://gist.github.com/andyferra/2554919
Add Demo description to README.md
Change markdown title.
Fix image can't find problem.
Supported OAuth-Token because avoid to rate limit.
Fix trim function bug
Fix url bug
Change url parameter to HTTP header for OAuth token