added number-type to settings framework. persist expanded object on server-side sync if changed
added pexpire and pexpireAt methods for redis and mongo. Added emoticons for leveldb (as per existing implementation by @psychobunny LOL)
closed #1453
added settings number-field to docs
closes #1516
Merge pull request #1514 from frissdiegurke/master

added number-type to settings framework. persist expanded object on serv...
using var instead of const for < IE10 compatibility

@frissdiegurke
some linting of settings.js
removed comment
fixes default gravatar images if they are uploaded locally
remove listener before adding
latest language strings