Fixes issue 3069.

Change-Id: I832f3caa972ff491a61dfd2f7eca2e715fde8903
Reviewed-on: http://gerrit.dmdirc.com/89
Reviewed-by: Chris Smith <chris@dmdirc.com>
Tested-by: Chris Smith <chris@dmdirc.com>

Issue 3111

Change-Id: Ieb8ca1c74cbe1e8fd9c9ba1ff4934fe3db1729c4
Reviewed-on: http://gerrit.dmdirc.com/86
Reviewed-by: Chris Smith <chris@dmdirc.com>
Tested-by: Chris Smith <chris@dmdirc.com>

Change-Id: I0ca6f30dd39aaa4ddf48fc52b8cf98529c5a35a8
Reviewed-on: http://gerrit.dmdirc.com/63
Reviewed-by: Gregory Holmes <greboid@dmdirc.com>
Tested-by: Gregory Holmes <greboid@dmdirc.com>

Issue 2921.

Remove the ability to change OutputQueue due to confusion, just allow changing the OutputHandler.

OutputHandlers are now incharge of creating QueueItems and comparing them.
Parser now allows for replacing the OutputQueue entirely
Default OutputQueue allows replacing of the OutputHandler (by giving it a new QueueFactory that outputs the alternative QueueHandler)
Sending PING is now High Priority
QueueItems now sort by a unique itemNumber not time, as priority queue doesn't guarentee order for itesm of teh same priority created at the same time
Add a rate-limited OutputQueue