Added proguard-project file back as building with it requires it.

Moved .gitignore changes to mobile/.gitignore

.gitignore

@@ -8,29 +8,3 @@ localbuildsettings.py
 # built application files
 *.apk
 *.ap_
-
-# files for the dex VM
-*.dex
-
-# Java class files
-*.class
-
-# generated files
-mobile/bin/
-mobile/gen/
-mobile/out/
-
-# Local configuration file (sdk path, etc)
-local.properties
-
-# Eclipse project files
-.classpath
-.project
-
-# IntelliJ IDEA user settings
-*.iws
-mobile/.idea/workspace.xml
-mobile/.idea/tasks.xml
-
-# Proguard logs
-mobile/proguard_logs/