Convert timing operator codes to HQMF2JS-compatible versions

### Story ###
- https://www.pivotaltracker.com/story/show/76131322

### Notes ###
- accounted for all MAT v4.0.0 timing operators within one massive satisfies all operator
- added unit test for supporting all current timing operators
- cross-referenced against [HQMF2JS](https://github.com/pophealth/hqmf2js/blob/master/app/assets/javascripts/hqmf_util.js.coffee#L668) timing operators list

### Screenshot (because I had to build it) ###
![screen shot 2014-08-01 at 2 54 31 pm](https://cloud.githubusercontent.com/assets/456952/3783508/763c8fe8-19ad-11e4-8c5d-9e867b947d58.png)