Merge branch 'develop' into tests

packages/rocketchat-api/server/routes.coffee

packages/rocketchat-authorization/server/startup.coffee

packages/rocketchat-i18n/i18n/en.i18n.json

packages/rocketchat-i18n/i18n/pt.i18n.json

packages/rocketchat-lib/package.js

packages/rocketchat-lib/server/functions/settings.coffee

...ages/rocketchat-lib/server/methods/cleanChannelHistory.js

packages/rocketchat-lib/server/methods/getChannelHistory.js

packages/rocketchat-lib/server/models/Messages.coffee

packages/rocketchat-livechat/app/client/lib/_livechat.js

...es/rocketchat-livechat/app/client/lib/chatMessages.coffee

packages/rocketchat-livechat/app/client/lib/commands.js

packages/rocketchat-livechat/app/client/lib/hooks.js

...s/rocketchat-livechat/app/client/stylesheets/loading.less

packages/rocketchat-livechat/app/client/views/loading.html

packages/rocketchat-livechat/app/client/views/messages.html

packages/rocketchat-livechat/app/client/views/messages.js

packages/rocketchat-livechat/app/client/views/register.html

packages/rocketchat-livechat/app/client/views/register.js

packages/rocketchat-livechat/assets/rocket-livechat.js