WCAG2.0-compliant luminosity contrast for <code>

#ff4500 has luminosity contrast of 3.4:1. Need at least 4.5:1. Use #dc3b00.
WCAG2.0-compliant contrast on colour for <code>

#DC3B00 provides contrast of 4.5:1 on white. But to provide a little flexibility, e.g. in the case that some <code> is in a <th> with background #eee, a colour of #C83500 provides 4.56:1 contrast, while still standing out as red text.
Allow references that are missing href.
Support Previous Version on NOTEs

As per a discussion on spec-prod, NOTEs can have Previous Versions, so we need to support output of that header too.
Allow permalink on div with an h* element
Test to ensure permalinks are on h* within div
Merge pull request #319 from halindrome/patch-2

Support Previous Version on NOTEs
Merge pull request #310 from tobie/fix-refs

Allow references that are missing href.
Merge pull request #307 from jasonkiss/develop

More accessible luminosity contrast on colour for <code>
Merge pull request #320 from halindrome/patch-3

Adding permalinks to h* within div
v3.2.16
Don't break NOTES that have no previous version
v3.2.17
add support for Process picking
v3.2.18
Add event publication when saving

Add event notifications to the save functions so that specifications can, if they wish, subscribe to the events to do processing prior to saving a snapshot (e.g., if a spec has some dynamic content and the author wants to be certain it is in a base state before saving).
Moved the notifications

Moved the calls to respecEvents.pub into the toString and toXML
methods so that they get called even in the event of a browser that
supports direct downloading.
Correct pointer for Travis
Update requireConfig.paths.ui to fix 'Save Snapshot' regression from migration.
Merge pull request #338 from anssiko/fix-requireconfig-paths

Update requireConfig.paths.ui to fix 'Save Snapshot' regression from migration.