licq: add valgrind suppressions to help find memory leaks
qt4-gui: Force queueing of plugin signals

Without queueing, plugin signals emitted from the GUI itself would
be handled before returning causing mutex deadlocks. By forcing all
signals to be queued the signal will be processed from the main thread
instead.
core: create plugin instance in the plugin's thread

As of 339a7b9 does qt4-gui's class that implements GeneralPluginInterface also
inherit from QObject. Creating an instance of this class from a thread != the
thread where QApplication is later created causes warnings about QApplication
not being created in the main thread.
core: fix compilation warning introduced in 59f10c28
core: don't push signals/events to plugins that aren't running
Merge branch 'master' into signals-as-shared-ptr

Conflicts:
	licq/src/plugin/tests/generalplugintest.cpp
	licq/src/plugin/tests/protocolplugintest.cpp
	qt4-gui/src/core/signalmanager.cpp