add sbt project definition, move source to src/main/scala
Merge branch 'master' of https://github.com/Happy0/scalascrabble into sbt

* 'master' of https://github.com/Happy0/scalascrabble:
  Added some changes based on Ornicar's helpful code review. Remaining suggestions are listed in a gist.
  Added some changes based on Ornicar's helpful code review. Remaining suggestions are listed in a gist.
  Fixed the scoring method. Should only apply bonus if the square isn't occupied.
  Fixed something. But my god, it looks horrendous even more horrendous...
Merge pull request #2 from ornicar/sbt

Sbt, second try