js/app.js
- added async directive to model relationships
- adjusted tag fixture locations to sit on cats' eyes
js/tag.js
- added two controllers for computing properties of tag labels and tag entries respectively
index.html
- added an index template
- made tagflow image and image labels data driven
- made tag entries data driven (except meaning and readings)
- commented new tagflow entry for now
- put tagflow image in a flush div so that labels at 0,0 are in the top left (associated css..)