Switch all followercounthistory tests to use relative months and weeks.
Add icons to links in _links.tpl

Uses g.etfv.co and specifies a default icon; now uses HTTPS exclusively.
Make link icons https safe, add tests.
Switch all followercounthistory tests to use relative months and weeks.
Switch all followercounthistory tests to use relative months and weeks.
Only show line chart for 3+ data points in ListMembership.
Switch all followercounthistory tests to use relative months and weeks.
Disable photos in stylestats

Commenting it out, not removing.
We'll want to turn it back on once we update the handling of photos
in the crawlers.
Don't generate enough weeks for testing that a monthly is generated.  Oi.
Merge pull request #1887 from cdmoyer/switch-all-followercounthistory-to-month-relative

Switch all followercounthistory tests to use relative months and weeks.
Merge pull request #1890 from cdmoyer/no-line-charts-for-low-datapoints

No line charts for fewer than 3 data points
Show special case text for allaboutme percentage being the same.
Update favorited_links to use $post->links and exclude twitter photos

Also updated with new tests
Only show frequency insight when there is text.

In practice, this is when there is a baseline to compare
or not posts.
Add commas to weekly graph text numbers when needed.
Merge pull request #1889 from cdmoyer/display-icons-next-to-links

Display icons next to links
Merge pull request #1891 from cdmoyer/only-show-frequency-insight-with-text

Only show frequency insight when there is text.
Merge pull request #1893 from cdmoyer/disable-photos-in-stylestats-for-now

Disable photos in stylestats for now
Merge pull request #1894 from cdmoyer/exclude-twitter-pics-from-favorted-links

Update favorited_links to use $post->links and exclude twitter photos
Merge pull request #1896 from cdmoyer/zero-is-not-enough-percentage-points-to-mention

Show special case text for allaboutme percentage being the same.