added cmake 2.8.11 backport
added hunspell library to cmake travis
Fix cmake build with travis.
Merge pull request #18 from ahmedcharles/development

Fix cmake build with travis.
Another cmake/travis fix.
Merge pull request #19 from ahmedcharles/development

Another cmake/travis fix.
Remove HUNSPELL hack in travis build.
Merge pull request #20 from ahmedcharles/test_travis

Remove HUNSPELL hack in travis build.
Travis doesn't support cmake version higher than 2.8.9.