Adding notice $class for client notices

Adding notice $class/case to sysmessage class to allow for injection of selector for the client notice. This will allow direct targeting in the DOM of the client notice alert.
Changing $class from zannounce to notice

Changing the $class of the notice class from zannounce to notice to allow the switch statement within the sysmessage class to identify it uniquely.
Adding JS to hide client notice on close

Utilizing JS and the existing cookies plugin to hide the client notice when it is closed until the reseller/admin changes it. Upon a change of the client notice the alert box will show again. When closed it will be hidden again till the subsequent change.
Suhosin var length adherence

Adhering to Suhosin's 64 character max limit on variable names while making sure to minimize possibility of recurring var name (in an instance there is prep-ended generic text within the news). Suhosin will trim automatically otherwise and output and error within the secure log.
Merge pull request #7 from stokes84/master

Adding JS to hide client notice on close  by stokes84