update for php 5.4
Update for php5.4
parse escaped php5.4 strings
Fixed fatal error issue when xdebug is installed and xdebug.cli_color is set to 2
Added .elc to the ignore list (src/xdebug-clients/geben/geben.elc)
memory_limit calculation recognizes suffixes

For a script, I set my memory_limit to 2G. phpsh then helpfully set my memory limit to 4M. What the heck. This is a fix.
Merge remote-tracking branch 'joeframbach/master'
Merge remote-tracking branch 'wesen/master'
Removing merged php5.3 requirement from user @wesen