Revert "Version bump to 0.1.3" so I can push to github without building new gem.
Revert "Version bump to 0.1.3" so I can push to github without building new gem.

This reverts commit d706478f3c2fe268e408e93bd45b40fdc49ee5ed.

mongomapper/mongomapper,Yesware/mongomapper,m3talsmith/mongomapper,dhemmat/mongomapper,kachick/mongomapper