Added links to compare releases
Merge branch 'hotfix/v1.3.1' into develop

Conflicts:
	README.md
Merge branch 'hotfix/v1.3.2' into develop
Change save format to support sites with multiple shirts per day
Load manifest in the background, once.
Bump version number to 1.4.0
Check if new version.

Clear the previous localStorage
Remove tilteed as the site and rss seems to have been broken for the last month
Remove includes that are no longer needed
Fix site order
Added DesignByHumans.com
Added OtherTees.com
Change pagination width
Switch DesignByHumans to their tumblr feed for the better picture
Improve update checking
- DBH custom feed
- A way to disable multi shirt per site
Error handling and logging
ignore alt shirts on theyetee
Merge branch 'release/v1.4.0'