edit existing Synapse markdown widgets
refactor and add tests
from code review
Merge pull request #513 from jay-hodgson/markdown-edit-existing

SWC-784: edit existing widget markdown
SWC-330 - small header on non home pages
code review changes
Merge pull request #520 from dburdick/swc-330

SWC-330 - small header on non home pages
Merge pull request #521 from jay-hodgson/develop

Advertise TeX (since MathML is not recognized)
move small header to alpha mode
Merge pull request #523 from dburdick/swc-330

move small header to alpha mode
SWC-673: this will be a parser instead of a widget.