Removed leftover @wip.
Fixed a text deletion bug.
Change the mouseup handlers so that they are fired only when a mousedown event was registered on the element we care about.
_canSetCaretHere is cruft from an earlier version; removed.
insertPlaceholderAt is cruft from an earlier version; removed.
Doc fix.
Implemented DLoc to replace the old two-element Arrays that were used to
record positions in the DOM.
Make it so that make test does not require building the optimized code.
Moved the refman tests from the browser tests to the CLI tests.