SRT - cast sr name to lowercase

Fixes comparisons to subreddits that use capitalization
Fix for estimatePostVotes counter
Merge pull request #1489 from gavin19/master

SRT - cast sr name to lowercase
fixes #1394
Convert 4 spaces to tabs
utils: Use simpler object notation
Merge pull request #1492 from mc10/style-fixes

Make minor style changes
migrate: Update "how-to" comment
Merge pull request #1493 from mc10/migrate

migrate: Update "how-to" comment
"RES ignored duplicate **link**" (instead of "image")

because too many pedants
better handling of loader / spinner for GIF albums and potential firefox gif freeze fix (really a FF bug, not RES, but hopefully this helps)
refactor togglebutton, uses of .html(), and createElementWithID (added ability to pass in more data including textContent)
.html() audit - used DOM creation where reasonable, noted areas whree .html() is still used but only with local info / should be safe, etc.
fix a bug with null user tags now that we're using textContent
fixes #1501 - GIFS with convertGifstoGfycat option turned on overlap content
fixes #1516
fix bg color of flair selector
use more specific selector for comment score in commentNavigator popular

fixes #1526
parse comment score into number when fetching it, not when sorting it. efficiency!
Firefox: Tree Style Tab compatibility

Fixes #1447.