Fix an exception message
Merge pull request #63 from madwyn/master

Fix an exception message
Fix MSVC 2013 compiling error C2440. MSVC doesn't understand return shared_ptr as bool.
Merge branch 'madwyn-master' into develop

Conflicts:
	plugins/pluginsreaderproviders/keyboard/keyboardreaderunit.cpp
	plugins/pluginsreaderproviders/rfideas/rfideasreaderunit.cpp
	src/services/accesscontrol/formats/wiegandformat.cpp