CXX-302 work on MCI config file

Some stylistic changes:
  -rename our builds so it's clear what we're testing (ie "Linux" -> "Ubuntu 14040")
  -refactor code to store common attributes in referenced hashes
And some changes to our buildvariants:
  -drop the static buildvariants
  -add a non-debug Ubuntu 1404 build
  -add a non-debug, non-dynamic Windows build
  -add a Windows build that uses msvc2013