move module management to scribe
get rid of logger for now

until we think through its design/purpose better
tweak
move normalizer tests
add tests
move document tests
add more tests to document.toDelta
define empty doc as div with span
refactor normalizer tests
separate unit and functional tests in grunt
fix normalizer tests
fix newline toDelta tests
fix format toDelta
add and fix failing test
temporarily disable failing selection tests
resolve todo