Addef FileUtil class for reading files.

Addef FileUtil class for reading files.
    FileUtil.cpp   (+)
    FileUtil.h     (+)
    TestFileUtil.h (+)
Added base classes for AngelScript management

Added base classes for AngelScript management
    src/script/ScriptContext.cpp  (+)
    src/script/ScriptContext.h    (+)
    src/script/ScriptEngine.cpp   (+)
    src/script/ScriptEngine.h     (+)
    src/script/ScriptModule.cpp   (+)
    src/script/ScriptModule.h     (+)
    src/script/TestScriptEngine.h (+)