Eliminate EXC_BAD_ACCESS issue in Simulator

Simulator seems to have some issues with DataDetectors in the bubbles.
Disabling them when running in the simulator to work around the bug.
(Also eliminate a compiler warning on line 216 related to 64-bit
compilation.)
Merge pull request #112 from winzig/issue_72_dataDetectorsInSimulator

Eliminate EXC_BAD_ACCESS issue in Simulator