updating changelog.
ver bumps up.
GHC 7.0 is no longer supported

refs #178
Work around https://github.com/simonmar/happy/issues/16
Merge pull request #180 from eagletmt/workaround-happy-travis

Workaround happy travis
Work around `canonicalizePath "/"` in GHC 7.2.2
GHC 7.2.2 also has fWarningFlags and fLangFlags
Pretty.showDocWith disappeard at GHC 7.7.20140110
Merge pull request #181 from eagletmt/fix-for-7.2.2

Fix for GHC 7.2.2
Merge pull request #182 from eagletmt/fix-for-ghc-7.7.20140110

Pretty.showDocWith disappeard at GHC 7.7.20140110