Hour of Code updates.
Merge branch 'staging' of github.com:code-dot-org/code-dot-org into staging
Employee Engagement: add optional 'Share on G+' button
Merge branch 'staging' of github.com:code-dot-org/code-dot-org into staging
Updated video meta tag.
Employee Engagement: add checkbox to hide display name from header.
Merge branch 'staging' of github.com:code-dot-org/code-dot-org into staging
Employee Engagement: Add Num Employees field. Zero out count on landing page.
move /company-profiles to /employees
Merge pull request #68 from code-dot-org/staging

DTT