Elaborated phpsh README TODO's for breakpoints/xdebug/fatal-undoing
Elaborated phpsh README TODO's for breakpoints/xdebug/fatal-undoing

Reviewed By: cpiro

Test Plan: nope

Revert Plan: Ok

terrorbox/phpsh,chooaya/phpsh,facebookarchive/phpsh,facebookarchive/phpsh,terrorbox/phpsh,rhee/phpsh,AsafMah/phpsh,rjmi004/phpsh,rjmi004/phpsh,AsafMah/phpsh,AsafMah/phpsh,terrorbox/phpsh,chooaya/phpsh,rjmi004/phpsh,rhee/phpsh,rhee/phpsh,chooaya/phpsh