Updated Play Services to version 7.3 and external libs for Eclipse build

mobile/com.sap.sailing.android.tracking.app/res/values/attrs.xml

@@ -1,11 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <declare-styleable name="SignalQualityIndicatorView">
-       <attr name="signalQuality" format="enum">
-           <enum name="none" value="0"/>
-           <enum name="poor" value="2"/>
-           <enum name="good" value="3"/>
-           <enum name="great" value="4"/>
-       </attr>
-   </declare-styleable>
-</resources>