Merge pull request #11 from hubertkosackicodete/master

added Vungle-2.1.1 adapter, Vungle SDK 3.2.1
Merge pull request #12 from hubertkosackicodete/master

fixed formatting of adapters.info files
Merge pull request #13 from hubertkosackicodete/master

unwinding changes from adding Vungle to beta