Added v1 web overview
Added android and iOS v1 overviews
Added stubs for individual provider docs
Added v1 password and custom auth docs for each platform
Fixed typo in custom auth docs
Fixed typo in v1 JS email/password docs
Added v1 web OAuth provider docs
Added v1 web API doc
Updated links in v1 web API reference
Got rid of back ticks on API docs headers
Fixed typo in v1 web API docs
Finished porting v1 docs
Added deprecation warning to main README
Minor docs cleanup and remove TODOs
Fixed broken link in docs
Merge pull request #63 from firebase/jw-docs

Added docs for Simple Login v1