Give the line wrapper a CSS class CodeMirror-code

Issue #1492
[css mode] Properly make keywords case-insensitive

Also prevent Object.prototype properties like toString from
being interpreted as keywords.

Closes #1495
add gutter filler
Add coverGutterNextToScrollbar option

Issue #1493
Fix copy/paste in IE
Simplify 53bc4b1f54670c827662d5210a37b35e63a07c39
add overwrite mode ("R") to vim keymap
Document toggleOverwrite method
[lint addon] Don't use -span- in css classes

Apparently Bootstrap messes with those.

Closes #1497
vim mode: Add tests covering word selection behavior.
vim mode: Fix off-by-one errors in word selection.

The below conforms to Vim's behavior regarding whitespace trimming.
Add CodeMirror Eclipse to real-world uses
CodeMirror should set spellcheck=false on the input textarea

WebKit does not honor autocorrect=off, but it does honor
spellcheck=false.
[javascript mode] Fix bug in handling of expressions without commas

Closes #1501
Don't call alignHorizontally before display update

Closes #1498
[sass mode] Support double-colon pseudo elements

Closes #1461
[smalltalk mode] add support for '$<...>' character syntax
[smalltalk mode] remove unused variable
[smalltalk mode] comma is special character
[smalltalk mode] disallow brackets in symbol literal