start on u verb progressive
start removing concept of RuVerb and UVerb
move exception verbs into regular verb functions
fix progressive tests, uncomment hanasu progressive tests
add more tests
fix bug in TeForm for ぐ verbs, add more tests
add Negative tests
simplify u verb negative logic
make map easier to read
try adding gofmt -s to travis.yml
update travis.yml
Merge pull request #4 from gojp/progressive

start on u verb progressive