Fix cannot save the file that tap the run button (iOS <= 6.1 only)
Add CODE_SIGN_IDENTITY
Shift the y pos for iOS7
Insert a line break at the 40 digits each
Add ScriptEngine::mErroredMrb variable

Exception occurs when an error occurs with the display function.
Because immediately close the mrb.

Solution:
  mErroredMrb = mMrb
  mMrb = NULL
  And delaying the closing mErroredMrb till destructor of ScriptEngine.
Add README.md, LICENSE.txt
Add HISTORY.md