added getting contact id using lua api

Ignore-this: 59b8a7776e77b653d69568be9555447

darcs-hash:20130906030522-c21fe-5ed9a27c1228cfb0e27aa8550d26b7f1ce111468
added ability to draw circles

Ignore-this: 9aacbe884eb3b59f3d2b72ca03b4eaa8

darcs-hash:20130906030549-c21fe-abc6280cdcc7ec06a7cef18956472445e11ff299