Made Extension class abstract, so it cannot be instanciated directly, and Extension::about() an abstract function.
Made Extension class abstract, so it cannot be instanciated directly, and Extension::about() an abstract function.

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