edit makefile for osx, readme
edit include path for osx SDL_image
cast to int in NR_HIGHSCORES
add SDLK_DELETE for editing player name
edit include path for SDL_image
remove undef main
target selection, edit Makefile, fix README
edit instructions, add #if defined (MACOSX)
osx - use frameworks or shared libs
Merge branch 'osx' of https://github.com/mattkelr/ia into osx