Changes for issue 26 - oXygen vs Oxygen.
Issue 26 - solve references to WebHelp name.
The WebHelp is a set of resources that contain a DITA OT plugin to convert DITA to WebHelp and a DocBook customization to convert DocBook to WebHelp.
retiring OxygenEntitiesDictionary

Moved entries to keydefs
Updated references
Merge branch 'dev'

* dev:
  retiring OxygenEntitiesDictionary
  Issue 26 - solve references to WebHelp name. The WebHelp is a set of resources that contain a DITA OT plugin to convert DITA to WebHelp and a DocBook customization to convert DocBook to WebHelp.
  Changes for issue 26 - oXygen vs Oxygen.