Add format script which invokes clang-format on the C++ source code (#41)

On Windows machines, clang-format.exe must be in the PATH environment variable.

simulation/frc_gazebo_plugins/limit_switch/src/switch.h

@@ -8,7 +8,7 @@
 #pragma once
 
 class Switch {
-public:
+ public:
   virtual ~Switch() {}
 
   /// \brief Returns true when the switch is triggered.