Merge pull request #102 from oerpub/remix-fixes-20131024

Fixes to play nicer with remix again
Merge pull request #103 from oerpub/59194686-backspacing-over-inline-math-makes-it-uneditable

stop math from being corrupted by backspace
remove ids from default block titles
Merge branch '59192250-dont-add-ids-to-titles' into testing