Allow extensions to create their own navigation groups. [Closes Issue #75]
Allow extensions to create their own navigation groups. [Closes Issue #75]

bauhouse/Bugaroo,nils-werner/Bugaroo,twiro/symphony-2,symphonycms/symphony-3,johnpuddephatt/symphony-2,tachyondecay/symphony-2,domain7/sym-cumulus,bauhouse/sym-intranet,jurajkapsz/symphony-2,ljonka/symphony-2,psychoticmeow/symphony-2,thebestsophist/personal-health-diary,bauhouse/Piano-Sonata,benesch/hilton-unar,bauhouse/sym-form-builder,michael-e/symphony-2,bauhouse/sym-pagoda,mazedigital/jcilearn,alexnantel88/symphony-2,bauhouse/sym-todo-list,yojeek/sym-community,embarknow/journey-cms,mazedigital/jcilearn,johnpuddephatt/symphony-2,psychoticmeow/journey-cms,TheJester12/issueprompt,embarknow/journey-cms,nils-werner/Bugaroo,jensscherbl/symphony,astudio/remixhair,rzantolas/Symphony-Test,jensscherbl/symphony,bauhouse/sym-pears,roshinebagha/Symphony-Test,alexnantel88/symphony-2,embarknow/journey-cms,bauhouse/members-forms-ensemble,yojeek/sym-community,builders/sym-bootstrap,allen/auth.getsymphony.com,bauhouse/sym-pagoda,roshinebagha/Symphony-Test,symphonycms/symphony-3,astudio/remixhair,tachyondecay/symphony-2,twiro/symphony-2,NikoMostWanted/symphony-2,TheJester12/issueprompt,brendo/symphony-2,bauhouse/sym-calendar,ayellowraven/projectplaten,thebestsophist/personal-health-diary,blaXXabla/projet_test_symphony,henrysingleton/litmusk,davjand/Checkout-Ensemble,henrysingleton/litmusk,TheJester12/issueprompt,DavidForster/symphony-2,bauhouse/sym-forum,DeuxHuitHuit/symphony-2,DeuxHuitHuit/symphony-2,NikoMostWanted/symphony-2,blaXXabla/projet_test_symphony,psychoticmeow/symphony-2,scottkf/nicholscommunications,eliksir/norske-webapps,jonmifsud/symphony-2,bauhouse/sym-pears,avanteweb/symphony-2,ahwayakchih/symphony-2,scottkf/keepflippin--on-symphony,embarknow/journey-cms,builders/sym-bauhouse-ensemble,davjand/Checkout-Ensemble,eliksir/norske-webapps,wastemobile/Symphony2.3.6,ljonka/symphony-2,builders/collective,avanteweb/symphony-2,Titch/Symph-test,builders/collective,symphonycms/sym-getsymphony,ahwayakchih/symphony-2,Titch/Symph-test,jdsimcoe/symphony-boilerplate,scottkf/nicholscommunications,rzantolas/Symphony-Test,embarknow/journey-cms,bauhouse/Piano-Sonata,builders/designadmin,jurajkapsz/symphony-2,chay83/Symphony-Shopping-Cart-Ensemble,psychoticmeow/journey-cms,bauhouse/members-forms-ensemble,wastemobile/Symphony2.3.6,brendo/symphony-2,jdsimcoe/symphony-boilerplate,symphonycms/symphony-2,ayellowraven/projectplaten,benesch/hilton-unar,psychoticmeow/journey-cms,bauhouse/sym-intranet,bauhouse/sym-todo-list,chay83/Symphony-Shopping-Cart-Ensemble,jdsimcoe/symphony-boilerplate,eliksir/norske-webapps,BloodBrother/symphony-2,builders/sym-bootstrap,mazedigital/jcilearn,symphonycms/sym-getsymphony,jonmifsud/symphony-2,psychoticmeow/journey-cms,allen/auth.getsymphony.com,bauhouse/Bugaroo,BloodBrother/symphony-2,psychoticmeow/journey-cms,pixelninja/imagick_effects,DavidForster/symphony-2,michael-e/symphony-2,jdsimcoe/symphony-boilerplate,symphonycms/symphony-2