Added AutoIt lexers
Added example file for test
Changed run.py to use abs path because os.path.dirname(__file__) maybe empty and causes errors
Updated _mapping.py, open in binary mode so \n will not be changed to OS specific end-of-line.
to fix issue #701
Overall, reasonable. If you can address comments in the next couple of days I hope to get this in Pygments 1.6.0