Network settings menu expanded

New bookmark was added to "Edit network" menu. It is named "Rotation settings" and there network operator can:

1. Set Invocation URL. This operation requires arrangement with Adgine.net technical support team.
2. May change separating symbol for content categories in META -tag "adgine_categories" from " , " to any other.
3. Set max number of clicks that count as real for 1 user during his client session (15 minutes.)