Added ExperimentActivity model and controller to store experiment results.
Merge pull request #389 from code-dot-org/delivered

Deploy delivered work to master
Merge pull request #392 from code-dot-org/delivered

Deploy delivered work to master
Adding the experimental setup for design on dashboard side.
Add imagemagick install step, clarify .profile step
Update README.md
Allow dialog to take id.
Update gemfile.lock to reflect removal of debugger.
Use dict syntax instead of block syntax.
Merge pull request #396 from code-dot-org/fix-followeds

Use dict syntax instead of block syntax.
Change learn.code.org signin "try now" options from buttons to links.  [#68156540]
Automatically upgraded blockly-dist.
simple text upsell for flappy
Automatically upgraded blockly-dist.
add a few brs after upsell at brendan's recommendation
reundeprecate User.followed
Merge pull request #400 from code-dot-org/flappyUpsell

[Finishes #68464268] simple text upsell for flappy
Merge pull request #397 from code-dot-org/signin

Minor signin UI improvement
Automatically upgraded blockly-dist.
Merge pull request #401 from code-dot-org/reundeprecate

reundeprecate User.followed