SWC-724: auto escape most markdown in code blocks
lost code span parser
Merge pull request #465 from heidiso/develop

SWC-692 Wikisubpages' TOC
Merge pull request #464 from jay-hodgson/SWC-724

Swc-724: special behavior for fenced code blocks (auto escape everything inside), and fix a bug with blockquote
html stripping causing problems. make preservation/restoration more efficient by precompiling the patterns
add test that fails before change, works after
Merge pull request #466 from jay-hodgson/develop

Fix bugs found while looking at whole-cell parameter estimation challenge page
SWC-701 Added bookmarking support

**Fixed a bug that did not allow some widgets to be rendered inline where it should be
SWC-701 Merge bookmarking feature for the markdown processor