All About You insight fix: Capitalize network name
Update weekly graph insight

Add insight text, so email has content.
Show actual popular posts in graph.
Move DashBoardModuleCacher::getHotPostVisualizationData to ChartHelper::getPostActivityVisualizationData, add tests.
Change insight headline.
Add test ensuring insight isn't generated without any active posts.
Don't show chart for <3 posts.  (Less than three, not love posts.)
Improve docblock for function hinting
Weekly graph copy improvements

* Use “past week” instead of “this week” for clarity
* Add variety to headlines
* Localize “replies” for Facebook
* Code style: same-line else, unnecessary whitespace
* Add tests for localized Facebook insight text and variable headlines
Make use of InsightTerms::getMultiplierAdverb in favlikespike

Particularly the 7 and 30 day average text.
Bugfix: the same insights shouldn't show up in back-to-back daily emails

Get insights for email, since the last send.

This should fix the situation where users in a timezone ahead of New York
get insights from the past 30+ hours in their daily emails.
Also for brand new users that get two emails less than 24 hours apart.
Modify FolloweCountHistory to use relatives date.

Should fix testWeeklyNextTenWeeks and testMonthlyUnder15Months
Merge pull request #1882 from cdmoyer/fix-monthly-follower-test

Modify FolloweCountHistory to use relatives date.
Weekly bests insight: don't render graph if there are no posts to show
ThanksCount insight and CriteriaMatchInsightPluginParent

CriteriaMatchInsightPluginParent is a parent class for insights which look at some posts
    and track the change in how many posts match something over time.
InsightBaselineDAO::getMostRecentInsightBaseline() is added to support this.
ThanksCount is an implementation that looks at thankful posts.
ThanksCount copy tweaks

Capitalize network names in copy.
Change 1 time to once.
Split headline into two options.
Update CriteriaMatchInsightPluginParent and ThanksCount

Add docblock about parent class.
Add more variety to ThanksCount output.
Use getOccurrencesAdverb.