[CB-2618] xcode build from Network Drive Fails

- fix copy of fileand symlinks attributes errors
- still attempt to hard link first but then do copy if that fails
[CB-2638] Fix iOS project warnings on Retina imgs

-fixed iphone and ipad 2x images to remove warnings
-ran images thru imageoptim
Fixed static analyzer issues.
[CB-1933] Changed button labels to an array.

This allows commas to be included in button label text.
Changed UIWebViewBounce to DisallowOverscroll.

Both are supported, but the default preference name is changed to align
with Android.
[CB-1688] Added a camera direction option.