Campaign Manager 1.2-beta1

Changes since Campaign Manager 1.1

• #33 Basic activities reporting to campaign screen - by @scardinius, @systopia
• #44 Add settings for built-in KPIs - by @systopia
• #47 Clean up action links in campaign view - by @systopia
• #45 Cache KPIs - by @systopia
• #55 To edit previously added expense you need to click through all of the expense fields - by @kpomaranska, @systopia
• #46 Load KPIs asynchronously - by @kpomaranska, @systopia
• #43 Show custom groups in campaign view - by @scardinius, @kpomaranska, @systopia
• #48 When adding parent to the campaign, it external id is set to null and this is visible on the campaign dashboard - by @kpomaranska, @systopia
• #36 alpha 1.1: detail page empty - by @bkaless, @scardinius, @jaapjansma
• #61 Installation fails due to method from config class - by @scardinius
• #63 View page not loading when there aren't any custom groups for campaigns - by @scardinius
• #74 Provide German localisation - by @jensschuppe
• #72 "Delete" action link for campaigns not working - by @scardinius, @jensschuppe
• #66 Missing permission for CampaignTree API - by @scardinius