Force rescanning on cross-page selection.
Merge pull request #26 from peerlibrary/cross-page-scan2

Force rescanning on cross-page selection
Add files forgotten to add in https://github.com/hypothesis/dom-text-mapper/commit/b29aa3045652043a0b45b869b01307e5977bbc66
Added files forgotten to add at https://github.com/hypothesis/dom-text-mapper/commit/ee4be45d4588ecace28575ba5586eb4fb29d9477#commitcomment-4827640
Bugfixes around Coffee's stupid string [start ... end] sysntax

Conflicts:
	src/dom_text_mapper.coffee
	src/dom_text_mapper.js
	src/dom_text_mapper.map
The "I love and hate CoffeScript" release (for master branch)

 * Fixed a bug in `saveSelection()`
 * I have just realized that CoffeeScript has both ".." and "...", with
   different semantics
Add tfoot to the workaroundlist, for #1