Adds purged folder names to .gitignore to help avoid carrying old history in future commits.
Merge pull request #1014 from kwhatmough/next

Adds purged folder names to .gitignore to help avoid carrying old histor...
Merge pull request #1017 from seanpaultaylor/master

GamePlay v1.7.0 - merged master to next
Merge branch 'next' of git://github.com/blackberry/GamePlay into StaticCodeAnalysis