Small improvements for building on Mac OS X

Added LIB_PREFIX to makefile allowing custom dependency location.
Added correct location for carbon framework headers
Merge pull request #8 from dpeek/mac-build-improvements

Small improvements for building on Mac OS X
fixed missing \0 when resizing down a string
Merge branch 'master' of github.com:HaxeFoundation/neko
Update mysql.c

Fix: support int32
Merge pull request #12 from ConstNW/patch-1

Add support for int32
fix compilation with Apache 2.4.x
exclude object, binary and backup files on Linux
Merge pull request #21 from Maxime2/apache2.4

fix compilation with Apache 2.4.x
Merge pull request #22 from Maxime2/gitignore

exclude object, binary and backup files on Linux
added std@buffer_get_length
When -silent, skip library compilation when its dependency is not found.
Merge pull request #25 from andyli/silent

when building libs, respect -silent for lib dependencies
added socket_send_to and socket_recv_from for UDP
updated
fix for windows (report invalid sendto as a 0 data read)
increased max codesize from 65K opcodes to 1M
allow break/continue in try...catch
bugfix in utf8_compare (was not working at all)