Suggested fix to broken attr behaviour

Fixed tests
Adding dev build and logs. Fixing test files.
Merge pull request #671 from RpprRoger/fix-map-attr

Suggested fix to broken attr behaviour
More logging with tests, fixing test files.
Some logging tweaks.
Increase log level in test.html files so that we can run them nicely in CI.
Merge pull request #692 from bitovi/devmode

Development mode builds
Merge branch 'master' into zepto_fn_extend