Test extension with a project template that installs packages from a folder defined within the registry.
Added Test VSIX Packages Extension and ItemTemplate Extension
Added link to jQuery package missing from previous commit
Upgraded to VS 2012 and added a new Hybrid project template that preinstalls packages from registry and VSIX.
Added more test cases for empty and no packages elements.
Merge branch 'Preinstalled'
Reorganized the Preinstalled package tests into this repo