Basic integration of CodeMirror v3:
- changed events on Editor to use new CodeMirror event mechanism instead of setOption()
- changed getScrollerElement() to getRootElement() for managing height
- changed delCharLeft()/delCharRight() to delCharBefore()/delCharAfter()
- changed various CodeMirror style classes whose names have changed
- commented out some unimplemented methods
- updated CodeMirror SHA
Initial integration of inline editors:
- update inline editors to use new addLineWidget() API
- use markText() for line hiding
- refresh host editor after adding an inline widget so CodeMirror updates its line heights properly
- make rule list appear in front of code in inline widget
Update CodeMirror SHA for upstream merge
Merge branch 'master' into cmv3
Update CodeMirror SHA
Clarified comment; cleaned up JSLint error
Update to latest CodeMirror upstream
Updated to latest CodeMirror
Merge remote-tracking branch 'origin/master' into cmv3
Update various uses of CodeMirror APIs to be compatible with v3, based on the upgrade guide in the v3 docs.
Merge branch 'master' into cmv3
Move font size definition/changes to .CodeMirror. Make editor padding relative to font size.
do not hide lines when the range is zero
Merge pull request #2024 from adobe/jasonsanjose/cmv3

[cmv3] do not hide lines when the range is zero
Enabled Haxe mode (with syntax highlighting). Require CodeMirror version > 3.0beta1 or > 2.31.
Use default cursor on menu and toolbar items, see #2141
Unit tests for block comment, line comment on empty lines, line comment
auto-switching to block comment & vice versa, and commenting in mixed
syntax modes.

The commented-out tests don't pass yet.
Merge remote-tracking branch 'remotes/upstream/master' into no-hand-cursor
No hand cursor for close icons
No hand cursor for swatches in inline color picker