Add a default

Add a default and check for support of devicePixelRatio
Merge remote-tracking branch 'upstream/master'
Reusable gravatar component
Lint clean the code.
Change to user / userId
Refactor code with reuse.
Merge pull request #436 from shaialon/gravatar-component

Turn Gravatars from random helpers into a component
Merge pull request #433 from steffenstraetz/master

Fixed issue that user would always be redirected to "/" after sign up and enables validation.
Rename common template/view 'gravatar' to 'avatar'
Modify getAvatarUrl function to use larger images for Twitter and Facebook
Add helpful comments to changes in getAvatarUrl function
Merge pull request #438 from bengott/avatar-tweaks

Avatar Tweaks
fix #441
Merge branch 'master' of github.com:TelescopeJS/Telescope
splitting settings form into field sets
fixing postsDaily template typo
Put controller block in Meteor.startup()
put controller block in startup()
wrap postsDaily helper in Meteor.startup()
Adding instructions to settings form