- Move a lot of methods from the CodeMirror to the Doc prototype
 - Allow getting, attaching, and copying of Doc objects
 - Add linkedDoc to create documents that stay in sync
 - Allow such linked docs to be sub-view on their parent
 - Rewrite history handling
 - Remove the concept of a view

Documentation still failing.

Add docs for first-class document features, split API section
into subsections to make it easier to read.

The mark would disappear into thin air if it was on a line
affected by the undo (or redo). Now it is properly preserved.

`makeChangeSingleDocInEditor` was throwing exceptions because
of the typo.

Stop passing 'true' as a changeset to updateDisplay, simplify a bunch
of things.

When the matching symbol of a closing bracket is on a different
line, it will match to the incorrect opening bracket. For example,
go to http://codemirror.net/demo/vim.html and place the cursor on
the closing brace at line 11 and press '%'.  It will incorrectly
match the opening brace on line 4 instead of the brace on line 8.
This patch fixes that by starting the line search at the *end* of
the line when searching backwards.

Add test.

Operating on line widgets from within an operation would cause
crashes.

Issue #1164

Closes #1176

These fire when the marker is removed/resurrected by editing and undo
operations.

Closes #1093

Issue #1178

…heck all the way up to the document body

The window.onresize handlers registered for each editor would prevent
them from ever getting collected.

Closes #1183

IE<9 does some truly messed-up things when it sees these.

Another great JS feature banished for the foreseeable future by
the bunglers in Redmont, sigh.

…braceRangeFinder

Closes #1185

See 67a5429

Closes #1184

… default to positioning the element below the position, and added "above" vertical positioning to default to sticking the widget above the pos instead

…ent below the char again

Issue #1189

This removes some duplicate code, and delays the scrolling to the next display update
which makes it less likely to interfere with other actions in unexpected ways.

Where it mysteriously makes the editor stop working (typed input no longer goes to
textarea) whenever highlighting fires.

Issue #1193

Issue #1194

Issue #1194

Issue #1187

There's no guarantee that we'll be able to get the document from the parent
link (might not be set).

Closes #1199

It had accidentally started taking window coordinates in the 3.0 refactor.