Re-organized into two submodules: service and uploader.

Moved all the existing service code into the `service` submodule.

Stubbed out project and GUI frame for the uploader. Idea is to have a GUI that
infers all the correct meta-data from media tag values and creates service,
songs, and performance records appropriately based on the tagged mp3/ogg files
of the performances.

.elasticbeanstalk/config.yml

@@ -11,4 +11,4 @@ global:
   repository: null
   sc: git
 deploy:
-  artifact: build/ROOT.war
+  artifact: service/build/ROOT.war

service/build.gradle

@@ -12,6 +12,8 @@ buildscript {
   }
 }
 
+import static com.jdbernard.gradle.ExecUtil.*
+
 dependencies {
     compile localGroovy()
     compile 'ch.qos.logback:logback-classic:1.1.8'