all single-modifier tests are enabled and pass now

- get rid of EmoteFlags class (use EmoteInfo now)
- add support for -invert and -i
- add html serialization support for rotation-wrapper
- get rid of commented-out methods
- for tests, add output of googlediff only if test fails
- install jasmine-node as dev dependency and invoke it as such
  - lets us get rid of npm global install of jasmine-node in travis.yml