Change documentation (issue #7)
This version introduces multiple enhancements:

Modified part for core libraries.
All documentation changed to english language, and written missing documentation.
Also changed some code convention in the same files.

Details of additions/deletions below:
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Modified:   /BLUE_FRAMEWORK/packages/tester/benchmark_class.php
            -- Added --
               turnOffBenchmark and turnOnBenchmark methods to turn on or off benchamrk
            -- Modified --
               changed code conventions
               added documentation
               documentation changed to english
               $_session variable was splited to some different variables
               cleared some methods from unused code

Modified:   /index.php
            -- Modified --
               changed name of benchmark_class methods

Modified:   /BLUE_FRAMEWORK/packages/CORE/core_class.php
            -- Modified --
               changed name of benchmark_class methods