Added new formaula for librcsc and soccerwindow2

librcsc 4.1.0 and soccerwindow2 5.1.0

librcsc: the library for Robocup soccer simulation.
soccerwindow2: the debugger for Robocup soccer simulation.
soccerwindow2 is dependent on librcsc.
Yes. they are in the same project home page.  

Let me explain on a relationship among the library and applications.
The project "rctools" has the library "librcsc", applications "agent-2d",  "soccerwindow2" and "FormationEditor".
These three applications depend on the library "librcsc". In adition, some of our community members also develop their own applications depending on the library "librcsc".

So, some community members would like to install the application "soccerwindow2". Other community members would like to install only the library "librcsc", because they build up their own applications.   

Therefore, I would like to prepare two formulas: librcsc.rb and soccerwindow2.rb.