New draft of "Hello MontageJS"

Still needs formatting fixes
Restyles figure + smaller images
Lighter figure caption color
Fixes css formating
Fixes code block indenting
Removes un-used Controls div
Code changes
Fixes nested list formatting
Update setup + tutorial images
New content for setup + helloM
Fix hello-montagejs formatting
Merge branch 'refs/heads/gh-pages' into hello-montagejs

Conflicts:
	stylesheets/pages.css
Fix code styling

that got missed in the merge conflict
Merge pull request #69 from montagejs/hello-montagejs

New Hello MontageJS + Set up
Link Getting Started button directly to hello...
Add new temp-converter
Update Temp Converter screenshot
Drop HTML5 from tagline
Restyled hero
Change title to MontageJS