Merge pull request #648 from stenington/btwf-campaign-project

Merge BTWF_campaign project to STAGING
further tweaks from Radhika
tweaks from Radhika
Removing some unnecessary or invalid CSS
Removing extra </p>, adjust some alignment
Merge pull request #654 from stenington/btwf-meetup

BTWF_local_meetup project revisions
Merge pull request #655 from stenington/btwf-campaign-project

BTWF_campaign project tweaks
Initial BTWF_animated_gif project import
Copy tweaks
Adjusting whitespace
Radhika's edits for BTWF_animated_gif
Simplifying the approach for an expandable gallery that lines up correctly
Simplify iframe styling
Use CSS for positioning instead of <br>s
Fix gallery centering
Remove accidentally committed second row of GIFs, and remove incorrect instruction
Enable margin-bottom of body tag to work
Adjust CSS whitespace/indentation
Use an overflow float-clearing technique that doesn't hide arrow graphic
And make overflow float-clearing look ok in edit mode too