Alpha/create-release-0.0.a6

[abdoohossamm]

• [x] Fix copy_needed_files function in djcompiler:
  • [x] re-copy the file if it exists
• [x] separate-djcompiler.djcompiler.compile_project-method-to-2-functions
• [x] add copy_needed_dirs() method to copy the needed dirs to the build dir
• [ ] change the version in setup.cfg and djcompiler.init.version to 0.0.a6
• [ ] update the README:
  • [ ] describe how to install the test versions.
• [ ] upload the version on test PyPI