To prevent a lot of DOM nodes from sticking around after measuring a
long line, easing the pressure on the GC.

Issue #902

It seems recent versions of Chrome/Blink fire the handler first,
and then clear the selection.

Issue #1730

(Works in real browsers.)

Closes #1726

 * Updated for CodeMirror 3 - added comment clock declarations

 * Corrected handling of macro calls with a body

 * Added extra features for detecting variables within strings and
   methods & properties of objects

 * Corrected the detection of methods and properties of Java objects

The were some minor issues w.r.t. where exactly an `stex` or `python`
inner mode starts and where the outer `rst` mode resumes; fixed.

Previously, if you tried to move further down the document than exist
the cursor would not move down.  This sets selectionEnd.line to be
no greater than the total length of the document.

Closes #1714

Issue #1710

Signed-off-by: Chris Granger <ibdknox@gmail.com>

Issue #1709

And a script to update it from the git data.

Moving to a situation where there's only one LICENSE for the whole
distribution.

(Even when the widest-line heuristic goes wrong.)