Made Essay questions work with backticks for easy formatting.  (Added typsetting context).

Removed TinyMCE since nobody used it and it kept giving errors.
Merge pull request #15 from goehle/master

Context Support For backticks in 2.7
Merge branch 'release/2.6' of https://github.com/openwebwork/pg into release/2.6

Merge updates for backticks from Geoff