Merge pull request #1 from codename68/master

OCamlSDL2_TTF useful primitives
added a "README" file
Merge branch 'master' of https://github.com/blue-prawn/OCamlSDL2_TTF
more complete stub names, to be explicit in use wuth "gdb"
give the ocaml function names on the ocaml side in case of an error
edit with the SDL2_ttf header
convert the TTF Style flags
Move source into directory src
Add support for ocamlfind in the makefile