Adds more examples

- A simple Listener
- A simple Condition
- Listening on repeated Buttons
Merge pull request #5 from aadsm/master

Add more examples
Change page title
Set montage version to 0.12.3
Set montage version to 0.12.4
Prevent sending empty files to gist

Gist doesn't allow the creation of empty files in a gist anymore, this is reported as "missing 'files' field".
Merge branch 'master' into gh-pages
npm upgrade