Add angular 1.3 compatibility

See e38208e60c0415d75856e40aba98961283b084ec for more info
spec null error fixed
Release 1.2.2
1.3 anngular compatibility on 1.2.X , issue #728
Release 1.2.3
issue #725 resolved , on path change and a gPolyline exists, then we must erase the gPOColyline
adding min
Release 1.2.4