Shouldn't actually need to specify frameworks any more in the project, now we're using modules.
Simplified unit test framework path for XC6.
Unfortunately this means that unit tests won't build any more under XC5. Blame Apple for moving the XCTest framework around!
Check for nil images before attempting to convert them.
Pass in a maximum size for image comparisons, to prevent allocating insane amounts of memory.
XC6.1 update.
Merge commit '03002f91381b5e27c8eaef72721a59a0618a15ce' into develop