some project cleanups

- removed gradle and proguard files, because they are not used, tested
  or updated at the moment

mobile/.idea/misc.xml

@@ -3,8 +3,31 @@
   <component name="EntryPointsManager">
     <entry_points version="2.0" />
   </component>
+  <component name="GradleLocalSettings">
+    <option name="modificationStamps">
+      <map>
+        <entry key="$PROJECT_DIR$/../../ShowcaseView/library" value="1379967589662" />
+      </map>
+    </option>
+  </component>
   <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="Android 4.3 Platform" project-jdk-type="Android SDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
+  <component name="masterDetails">
+    <states>
+      <state key="ProjectJDKs.UI">
+        <settings>
+          <last-edited>Android 4.3 Platform</last-edited>
+          <splitter-proportions>
+            <option name="proportions">
+              <list>
+                <option value="0.2" />
+              </list>
+            </option>
+          </splitter-proportions>
+        </settings>
+      </state>
+    </states>
+  </component>
 </project>