Errors when building without precompiled headers

[vshashenko]

We incorporate the source code of the library into a large project, which we build using cmake. Since cmake doesn't officially support precompiled headers yet, we don't use them. This causes compilation errors on iOS because of a missing include for UIKit, which is only included from the PCH file. It's trivial to fix and we patched the code, but I wanted to let you know about this use case. Maybe you'll want to do something about it so the library can be used flawlessly in cmake/non-PCH setups.

[lmirosevic]

👍