Core: Cleaned up SingleStep(), updated default LCD refresh to assume each instruction is ~3 cycles
Kernel: Updated several member functions to be const
Mutex: Moved ReleaseMutex iterator declaration to be inside while loop.
HLE: Updated various handle debug assertions to be more clear.
Kernel: Updated various kernel function "name" arguments to be const references.
HLE: Updated all uses of NULL to nullptr (to be C++11 compliant)
SVC: Moved declaration of "wait" variable in SendSyncRequest for improved readability.