#5 add DeploygateExtension
#5 add ApkTarget
#5 add Apk
#5 support multiple apks
#5 fix indent
#5 change READEME and build.gradle
#5 change apkUpload description
#5 add DeployGateTask
#5 add gradlew
#5 add test
#5 support travis build test
#5 update README and v0.3 release set up
Merge pull request #6 from DeployGate/issue/5

#5 Support upload multiple apks