Fixes the PREG_REPLACE_EVAL usage vulnerability

Usage of e in preg_replace is deprecated due to security vulnerabilities, in place of that preg_replace_callback can be used
http://www.php.net/manual/en/reference.pcre.pattern.modifiers.php
Merge pull request #47 from UmeshSingla/patch-1

 Fixes the PREG_REPLACE_EVAL usage vulnerability
preg_replace warning solution correction

Calling preg_replace_callback was not the solution to the preg_replace warning, we only needed to change "!se" to "!s" in the regular expression for resolving the Warning that PHP was generating.
Merge pull request #48 from gagan0123/master

preg_replace warning solution correction
Update post meta UI, style
Merge origin/foundation into foundation
Merge origin/master into foundation