Bumped version number up to 0.1.3 for release.
Bumped version number up to 0.1.3 for release.

mnuhn/bson,jbenet/bson,andreas/bson,martinkou/bson,cupcicm/bson,WingGao/bson,jpaalasm/bson,hildjj/bson,jchia/bson,stevei101/bson,ciappi/Yaranullin,hisery/bson,eklitzke/bson,msabramo/bson