rename zAxisTranspose to zIndex to be more accurate
add EmoteMap to the list of CommonJS-exported classes
strip quotes from css attribute values to not break html quoting
add support for parsing multiple emotes out of a string
remove references to backstage, which is dead
expose EmoteMap as a public property

- this keeps the caller from having to explicitly construct one
- also makes it simpler to ensure only one is made in typical code
add test case for the negative x shift serialized form
build files