[TASK] added MarkerShape type constants.
Merge branch 'master' of https://github.com/adgrafik/GoogleMapsPHP.git
Merge branch 'master' of https://github.com/adgrafik/GoogleMapsPHP.git
Merge branch 'master' of git@github.com:adgrafik/GoogleMapsPHP.git
[TASK] Changed MapBuilder __call function to return itself.