Update VSIX

Update VSIX to support future VS.  Fix the gitignore file to include
nuget packages in the git.  Include all the needed nuget packages so
it's independent of the packages installed by Visual Studio.  Link to js
files in the sample project so we don't have to copy it to vsix every
time there is a change.
Update packages

Update ember.js, ember.data.js to latest packgers.  Update most other
packages.  Update webapiAdapter.js due to ember.data change.
Left over file changes from last Update

Left over file changes from last Update