Essential for working on Macs

Gets rid of .DS_Store files
fix BooleanOps scaladoc
Merge pull request #197 from xuwei-k/fix-BooleanOps-scaladoc

fix BooleanOps scaladoc
Accumulate in the left argument of foldl1's `f'.
Test analogy of fold* family with fold*/reduce* family from scala.collection.
Merge pull request #199 from etorreborre/scalaz-seven

Added groupWhen to IndexedSeq and List
Change checks added in parent to props, per #199.
Merge pull request #200 from S11001001/topic/derived-foldl

Make foldl1 accumulate on the left, like foldl
fix scalacheck url
Merge pull request #202 from xuwei-k/scalacheck-url

fix scalacheck url
fixed seriously broken Order[Map[K,V]] instance
fixed filterM impl in Monad trait, added test, and delegated to it in list functions
fix history instance type
Merge pull request #205 from xuwei-k/history

fix history instance type
added test for previously busted Map ordering
Merge remote-tracking branch 'origin/scalaz-seven' into scalaz-seven
delete unnecessary inheritance. all MonadPlus is ApplicativePlus
Merge pull request #206 from xuwei-k/delete-ApplicativePlus

delete unnecessary inheritance
removed defunct ivy.xml and ivysettings.xml files
removed mixin of IdInstance in IndexedSeqSubFunctions