Added static function IsImage to cImage.
I've been doing some research to try to cross-compile iOS apps from Linux, but it seems that there are some problems, but i'll keep trying.
Now is almost feature complete comparing to the old Makefile.
iOS support is pending, and may be also Android support.
Moved options to "newoption", added libsndfile support and static backend compilation.
Now header files are inside the include folder, and the source files inside src.
Moved the projects files inside a projects folder.
Precompiled static libs will be inside libs folder.