Added changelog for 0.1.1 release

- [Issue #4] Typecheck .jsx files
- [Issue #22] Return a nonzero exit code from 'flow check' if there are errors
- [IRC report] Autostart the Flow server on all commands
- Improve the printing of types in 'flow suggest'
- Add a --timeout option to all commands
- [PR #27] Clearer error message when 'flow init' hasn't been run
- [PR #39] Fix to Emacs bindings
- [PR #53] Support node modules that end in .js
- [PR #59] Fix example
- [PR #65] Fix dependencies in flux-chat example
- [PR #66] Add type definitions for HTMLCanvasElement