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.)
Adjusting bubble edge insets to improve sharpness

Adjustments made to insets to sharpen up the appearance of the bubble
on the top/right edges.
Merge pull request #112 from winzig/issue_72_dataDetectorsInSimulator

Eliminate EXC_BAD_ACCESS issue in Simulator
Merge pull request #113 from winzig/issue_110_sharperBubbleCorners

Issue 110 sharper bubble corners, closes #110
closes #111
set bubble view default font. closes 107.
tweak bubble insets. cc: issue 110.
version 3.4.1
Update README.md
fix tableview content edge insets the right way. now compatible with storyboards.
fix KVO issues. closes #109
fix message bubble blurriness. closes #115. closes #56.
version bump to 3.4.2