Merge pull request #167 from acmetech/master

remove some whitespace
Merge pull request #168 from acmetech/master

add coveralls support
Correction tests
Merge remote-tracking branch 'upstream/master'
Merge pull request #170 from acmetech/master

move some gems to the gemspec
Merge pull request #169 from MartinGoulet/master

Correction tests
Merge remote-tracking branch 'upstream/master'
try travis cache only