Fixes failed build
- Setting ENV["ENABLE_DO_BY"] = '1' should be part of the tests
Merge pull request #11 from padi/add_test_for_ENABLE_DO_BY

Fixes currently failing build
Update README.md
Update README.md
Update README.md
Update README.md
Add Code Climate free badge
Merge pull request #10 from padi/code_climate

Add Code Climate free badge
Update README.md
Update README.md
Add FIXME and OPTIMIZE