Update download URL generation algorithm
Promote newer release versions
Merge pull request #84 from townxelliot/download-links-1282

Download links
Fix link to Android SDK setup instructions
Merge pull request #85 from townxelliot/android-sdk-link-1290

Fix link to Android SDK setup instructions
Squeeze left-hand column to 220px

This necessitated making the title of one of the Tizen IVI
tutorial pages shorter.
Basic resizing + left menu hiding
Get menu collapse working when screen <= 600px
Don't show menu collapse button on home page