Remove the 10.7 deployment target for SBJson

Thanks to @nriley for the fix, and this closes #117
Merge pull request #142 from nriley/master

Quick Look for album art, station in window title, misc cleanups
Updating the CHANGELOG
v1.1.18
Set MACOSX_DEPLOYMENT_TARGET to 10.6 for all embedded frameworks.

Closes #117 for real.