iOS: Switch to using UIApplicationMain() in dw_main(). This is not a long term solution since it never exits and has some other limitations, but apparently it does some setup we were not doing. We are now getting auto constraint errors due to conflicts with the DW layout engine. Some changes to avoid these but still getting them... so more work needed.

prefix=@prefix@
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir=${exec_prefix}/include
 
Name: dwindows
Description: Dynamic Windows Cross platform UI Toolkit
Version: @VERSION@
Libs: -L${prefix}/lib -ldwindows @LIBS@
Cflags: -I${prefix}/include @CFLAGS@ -D@DW_DEFINE@