added Core class
adjusted plugins
removed 'subscribe', 'unsubscribe' and 'publish' from API
combine node tests
use a separate mediator for the xmpp plugin
added 'emit' method to submodule plugin
configure permissions with an object; add option to add permission to all channels
use '*' as wildcard for permissions
added method to define a local i18n object
check first parameter
just warn
extended the clock module
added missing brackets
added option to clock module to hide the seconds digits; use stylus instead of css
remove some css properties