Changed directories of source files
Changed readme file and added Travis CI support
Added image extension in the readme, my bad
Changed all String types to ByteString
Deleted a line from readme
Merge conflict fixed
Merge branch 'master' of https://github.com/joom/Norvigs-Spelling-Corrector
Merge pull request #4 from joom/master

Changed String types to ByteString and added new directories for source files.