basic file structure (issue #1)

This version introduces multiple enhancements:

added some basic required files

Details of additions/deletions below:
--------------------------------------------------------------

Added:      examples/benchamrk.php
            -- Added --
                benchamrk examples

Added:      examples/tracer.php
            -- Added --
                tracer examples

Added:      src/Debug/Tracer.php
            -- Added --
                tracer library

Added:      src/Debug/Debugger.php
            -- Added --
                debugger library

Added:      src/Performance/Benchamrk.php
            -- Added --
                benchamrk library

Added:      composer.json
            -- Added --
                package description

Added:      examples/footer.php
Added:      examples/header.php
Added:      phpunit.xml
Added:      CHANGELOG.md
Added:      .gitignore

Modified:   README.md
            -- Added --
                some basic package description