Merge pull request #1120 from jlipps/master

more ios 7 compatibility updates
Fix --avd flag by removing double quotes (spawn doesn't like them, only exec)
Adding desired capabilities doc
Merge pull request #1122 from penguinho/avd_fix

Fix --avd flag by removing double quotes
Update caps.md
Fixing error thrown when trying to read Localizable.string off a real device
Must run safari on simulator before running appium

Fix #755
Merge pull request #1124 from penguinho/fix_real_devices

Fixing error thrown when trying to read Localizable.string off a real de...
MoveTo now moves to the center if no offset is provided
Merge pull request #1121 from penguinho/moveto_center_fix

MoveTo now moves to the center if no offsets are provided
update gappium