add TIFF, giflib dependencies for MinGW and MSYS

Update Hunter and HunterGate versions

Fix dependencies

CMake: Workaround for Xcode + OBJECT

Add dummy.c file to library

CMake: Workaround for Xcode + OBJECT

Add dummy.cpp file to library

CMake: Fix missing dependencies

Fix relocation: avoid saving full path in install *Config.cmake file

Fix iOS simulator build

Merge pull request hunter-packages#4 from mchiasson/hunter-0.6.1

Fixed android, windows, mingw, mysys, osx, and ios

Merge pull request hunter-packages#2 from mchiasson/hunter-0.6.1

Fixed missing INTERFACE_INCLUDE_DIRECTORIES