Add a hack to enable building a release candidate.

With proguard "-optimizationpasses 5", not able to
obfuscate the CursorLoader. A known issue.

Remove
- AndoridMockRuntime.jar
- googleloginclient-helper.jar
AndoridMockRuntime.jar was included twice, preventing unit tests
from running.

Clean up classpath to not include jar files in the lib directory.
Else the jar files will get included twice.

Move jar files in MyTracks/lib/google-api-client/ to MyTracks/lib
so that proguard can pick up the jar files.

Clean up proguard.cfg into three sections.
- update the config from the default project
- update the config from the Google APIs client library
- remove unnecessary My Tracks specific "-dontwarn"

MyTracks/libs/README.txt

@@ -3,10 +3,21 @@ own licenses, which allow their usage for the My Tracks application. Any other
 applications that wish to use these files should consult the appropriate
 licenses or the JAR's authors.
 
-google-api-client/
-- see http://code.google.com/p/google-api-java-client/.
-- contains Google API client library, google-api-client-1.5.0-beta.jar, and its
-  dependencies.
+Android Support Package:
+android-support-v4.jar
+- see http://developer.android.com/sdk/compatibility-library.html
+
+Google APIs Client Library for Java:
+commons-codec-1.3.jar
+commons-logging-1.1.1.jar
+google-api-client-1.5.0-beta.jar
+google-http-client-1.5.0-beta.jar
+google-oauth-client-1.5.0-beta.jar
+gson-1.6.jar
+guava-r09.jar
+jackson-core-asl-1.6.7.jar
+jsr305-1.3.9.jar
+- see http://code.google.com/p/google-api-java-client/
 - google-api-client-1.5.0-beta.jar depends on protobuf-java-2.2.0.jar, however,
   MyTracksLib already includes protobuf-java.2.3.0-lite.jar. Thus using the
   newer version, protobuf-java.2.3.0-lite.jar.
@@ -14,9 +25,9 @@ google-api-client/
   some of its classes are already included in the android framework, thus not
   including xpp3-1.1.4c.jar.
 
-google-common.jar
-
-googleloginclient-helper.jar
-
+Google Analytics:
 libGoogleAnalytics.jar
-- see http://code.google.com/mobile/analytics/docs/.
+- see http://code.google.com/apis/analytics/docs/mobile/android.html
+
+Others:
+google-common.jar