CTRex.cabal: update for ghc-7.8.3

Added containers depend
Added required 'EmptyDataDecls' and 'PatternGuards' extensions.
Sorted long lists alphabetically.

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Merge pull request #2 from trofi/master

CTRex.cabal: update for ghc-7.8.3