TravisCI
tweaked CGRect.make to allow points or point-like arrays (and same for sizes)
added CGAffineTransform
CGAffineTransform changes

added concat and invert - the + << and -@ methods are aliased to the named methods
fixed some things
added to the README
hehe, ooops
Merge pull request #9 from colinta/master

Adds CGAffineTransform