Add cmake build files for ToneGenerator

I used this instruction http://lpapp.blogspot.com/2013/02/geekish-application-development-for.html

Still have some issue: Application doesn't run if compile with flag `-DUSING_GL20`, only with `-DUSING_GL11`

Btw do you know how to find out correct lib file for function? (from lib/ folder). It's not always have same name with `.h` file