Update GitChanges utility to require slash-prefixed-and-suffixed paths

eg:

/
/boo/
/boo/foo/

not

boo
boo/foo
/boo/foo
Update to latest version of Scala
Fetch a few more closed-PRs - NGW Frontend is very busy
so this is how we might grab config...
Revert "Update to latest version of Scala"

This reverts commit 912d51923e405bc86886f7a9e1cf57a66a88ad25.

Scala 2.11.3 is DOA

https://groups.google.com/forum/#!msg/scala-internals/SSD9BNJaFbU/rACBkHrs2JEJ