added travis builds for particular ghc versions
travis: enabling ghc 7.4.2 and 7.6.3
dropping the language definition in .travis.yml
reorganising, documenting and cleaning up of make file
prints the ghc package list after install
target to echo relevant variables of makefile
travis: platforms specific builds
enabling platform 2012.2.0.0
enabling platform 2013.2.0.0
Merge multi version/platform travis builds fixes #66.