Drop unsupported travis node version
AMD and global exports
Merge pull request #33 from ovcharik/master

AMD and global exports
Don't rely on Array.prototype.map
Map: Removed sparse array support
Merge pull request #31 from papandreou/map

Don't rely on Array.prototype.map
Add support for sentences.
Merge remote-tracking branch 'origin/master'
Ignore intellij files.
Merge branch 'add/diff-sentences'