[smalltalk mode] add support for "#'...'" symbol syntax
[tern addon] Fix a few bugs
[tern addon] Pass file name and document to fileFilter
Add -moz-box-sizing rules to the styles that use box-sizing

Apparenly Firefox still hasn't caught up on the unprefixed version.
Propagate StringStream's match() fixes to runmode
[vim keymap] Define a vim option, register beforeSelectionChange handler

Issue #1084
Issue #1630
Fix bug in findWordAt

Which could result in a selection at a negative character offset
when double-clicking.

Issue #1638
[real-world uses] Add Fiddle Salad
[compression helper] Sort and complete addon scripts
[merge addon] Make sure synchronized scrolling scrolls other pane to top/bot
[merge addon] Synchronize vertical scrolling
[merge addon] Use CodeMirror-merge-* CSS class names

Since the addon is called merge, not diff.