Added a proguard task.
Added a proguard task.

RPangularJS/JenkinsTraial,dwarakanath9/test,TheKingOfFasterr/test,skeeto/Turkbait,winxlor/sample-java-project,skeeto/fun-liquid,skeeto/keyjoy,ajcohen63/ajcohen63,nanthakumare/myproject,skeeto/fun-liquid,nelmajordao/teste,skeeto/Turkhouse,nareshreddyp/NareshRepo,jpenekusu/my-sample-java-project,es11558/Java-Project,skeeto/fun-liquid,Mounika-Chirukuri/sample-java-project,PonmaniPandian/sample-java-project,srinivasgowda097/sample-java-project,manjuk41/p1,achilleasxy/sample-java-project,sriram80/SampleAnt,skeeto/sample-java-project,skeeto/Halftone,skeeto/unstar,pjoshi0788/sample-java-project