GhidraEmu v2.1

• Step Over feature added, hotkey "F6" (check out README for example)
• Jump Over feature added, hotkey "J" (check out README for example)
• added a more visual highlight during the emulation in orange, which now plays
  the role of a mark where you are now in accordance with your PC value (check out README for example)
• overridden MemoryFaultHandler (emulator will
  stop running/stepping when it encounters an uninitialized read)
• prohibition to start emulation if the previous emulation state is not cleared
• JSR instruction (Delayed Branch in SuperH), fixed problem with the next address painting
• softened the handling of uninitialized write errors
• Update values of all registers (GUI) during running
• Fix overlapping related register values
• fixed various bugs