Added link for SPEAK app shortcuts in Sitecore 8

Link to blog post describing changes between Shortcuts for apps in
Sitecore  7's LaunchPad and shortcuts in Sitecore 8's Dashboard apps.
Moved Upgrading and Migrating out to it's own page
Added post about IntelliSense with MVC views
Added post about using the CopySauce tool
Added post about a custom Glass Data Handler
Added posts about Rocks and Razl Tools
Added some SPEAK post links
Merge pull request #6 from SaintSkeeta/gh-pages

Added a bunch of links to blog posts in various areas