Auto-escape all output from PHP

See here: https://github.com/xmalloc/php-auto-escape

Though, we restore unescaped output for print,echo.printf,...

Had to manually apply some diffs to get it to work with php 5.4
For the functions that were copied, re-copy them with the new php 5.4
implementations and change the prints to print_escape.
Make PHP short tags use their own lexer token

Instead of modifying the existing T_ECHO
Add new php "raw" short tag

It does no auto-escaping at all but functions the same otherwise.
Tests: add for __auto_escape and <?raw=