remove unnecessary return statement inside Discourse.Router.map

Ember's Router.map(callback) method doesn't expect any value to be
returned by callback function. Therefore, return statements present
inside Discourse.Router.map are unnecessary (and are silently ignored by
Ember).
Remove duplicate create method in PostCreator
Fix missing provider param message when using Persona
Merge branch 'master' of github.com:discourse/discourse
Show mobile view as default for nexus 7 tablet
Typo fix
Merge pull request #1463 from gaurish/patch-3

Typo fix
adds unit tests for Discourse.Resolver
增加移动版Header和样式表
add edit and quote admonitions to seq reply warn
Minor fixes

* add discourse to sudo
* add `bundle exec` on some calls
* inform user of NUM_WEB/sockets count for nginx config
adds unit tests for Discourse.Model
Merge pull request #1472 from velesin/model_tests

adds unit tests for Discourse.Model
Merge pull request #1451 from velesin/remove_return_from_router_map

remove unnecessary return statement inside Discourse.Router.map
allow users to specify thumbnail size
German typo fix
Merge pull request #1474 from jhilden/patch-1

German typo fix
Merge pull request #1458 from thomas-mcdonald/remove-duplicate-method

Remove duplicate create method in PostCreator
Italian localization (pt. 1)

First ~600 lines of italian translation revisited including missing
strings.

TODO: lines 581+
Merge pull request #1467 from velesin/resolver_tests

adds unit tests for Discourse.Resolver