Merge pull request #1 from melonjs/gh-pages

updated 0.9.7 branch
Updated tutorial to use `inViewport` instead of `visible` for object visibility test. Thanks Chris Lau!
re-applied changes from the melonjs main branch (0.9.7)
manually add this here as well
same for the ribbon
Updated link to documentation
Updated with last version of melonJS
Fixed #2 : missing steps to defined object properties
Updated the whole source code to follow the newly defined boilerplate
more changes to the html - still a work in progress
reporting changes proposal by @TravisPaul to this branch
More fixes to comply with 0.9.7 changes

- changes respecting to the default boilerplate
- fixed documentation links
- fixed some indicated paths to the data file (img)
- tiny introduction on the renderable property
- some  typos
fixed initial requirements description
Merge remote-tracking branch 'origin/0.9.7' into gh-pages