Markdown: Content Item Implementation

Implemented complete markdown editing and display for exhibit content
item descriptions, including preview, help and hints.

Implemented markdown editing and display for tour stop descriptions,
with preview, help and hints to follow.
Merge branch 'NeilCresswell-markdown'
Markdown: Tour Stop Implementation

Added Markdown help and hints to tour stop editing panel. Also changed
Markdown editor inputs (not rendering) to be monospaced so can support
features such as table layout.
Merge branch 'markdown' of git://github.com/NeilCresswell/ChronoZoom into NeilCresswell-markdown
Merge branch 'NeilCresswell-markdown'
updated footer links to point to new blog.
Merge pull request #1350 from willum070/helplinks

updated footer links to point to new blog.
Cleanup of files, removal of files that were moved to wiki.

deleted image files (they too were moved to the wiki.)

deleted 'working' folder.
Added one more link to the UW page.
Merge pull request #1351 from willum070/doc-1

Cleanup of files, removal of files that were moved to wiki.
Merge pull request #1352 from willum070/doc-2

Added one more link to the UW page.
Merge branch 'master' into search

Manually resolved cz.min.css conflict.