Added offset to times in instgram crawler test.
Better organization of the CSS; split groups of code into separate LESS files.
Merge pull request #1924 from capndesign/less-split

Better organization of the CSS; split groups into separate LESS files [ci skip]
Null builders in ActivitySpikeInsight test teardown to prevent 255.
Merge pull request #1927 from cdmoyer/make-instagram-test-timezone-agnostic

Fix some test issues
Add User to all generateInsight calls.

Pass through in PluginInsightRegistrar.
Look up and pass in in InsightsGeneratorPlugin.
Update all tests and insights.
Follow Count Visualizer Plugin

Celebrates follower count milestones with a metaphor.
references #1913