Etherpad v1.5.2

NEW: Support for node version 0.12.x
NEW: API endpoint saveRevision, getSavedRevisionCount and listSavedRevisions
NEW: setting to allow load testing
Fix: Rare scroll issue
Fix: Handling of custom pad path
Fix: Better error handling of imports and exports of type "etherpad"
Fix: Walking caret in chrome
Fix: Better handling for changeset problems
SECURITY Fix: Information leak for etherpad exports (CVE-2015-2298)