extract company profiles intro top/bottom content into markdown files. Make minor text edits.
Implement TextRender.safe_markdown, and use it to render user-entered input on the edit-company-profile form. Bump redcarpet to version 3.1.1.
Merge pull request #44 from code-dot-org/hoc-ee-markdown

Extract HoC EE markdown into separate files and touch up content.
Add doc on staging packages
Update doc on lesson plan generation
Add course 4 folder
when an affiliate closes a workshop, store a snapshot of the attendee progress data (when processing the corresponding ProfessionalDevelopmentWorkshop form)
Add dropbox share how-to guide
Added WorkshopFacilitatorProfile form definition.
Added Chronic gem.
Zoom to marker on click.
Require a specific version of Chronic.
Replaced error logic on workshop signup page.
Require a specific version of Chronic.
Added to_solr method to Geocoder.
Added lat-lng coordinates to returned results.
Added more location data to the workshop index.
Added first date to Solr index.
Display error if first workshop date is in the past.
Merge branch snapshot-progress