Add support to ManifestUpdateMojo for customizing the supports-screens element.
added option to filter META-INF/maven/** and META-INF/MANIFEST.MF from
input jars
added possibility to use proguard from a plugin dependency
Changed the artefact version and pointed the repository location to my own nexus... DO NOT merge this change!
Add resources specified by ${android.metaIncludes} to the final APK,
right after apkbuilder invocation

TODO: must investigate proguard invocation as well
honour ${android.extractDuplicates}
Two tests are not annotated as tests (but are still executed as part of the test suite). 

Do we need the @Test annotations at all, and if so, shouldn't these two tests have them too?
Add a helper method to either get or create a DOM element in the Manifest XML
Add a test for updating the supports-screens element, and add the missing resizeable attribute.
Add an XmlHelper class to simplify DOM manipulations via the w3c APIs.
Add support for the compatible-screens element.

I had to disable the unit test for now, since the way we make assertions against the Manifest is not deterministic. It tests for order of elements (since it tests against strings), which is unnecessarily strict. The Manifest elements may appear in any order.
Move getOrCreateElement to XmlHelper.
Extract the remaining XML attributes into constants.
Fix the way the configuration is injected in tests; it was accidentally defined outside the manifest block in the POM.
Update documentation.
Output a log message whenever supports-screens or compatible-screens are updated.
rolled back to original pom.xml
followed mosabua's notes on github, excepting ${android.apk.metaIncludes}
Issue 239: NDK mojo should validate the NDK version and report error if not correct - started validation code
Merge branch 'master' of github.com:johanlindquist/maven-android-plugin into verify-ndk-version
- created APK configuration for metaIncludes, extractDuplicates and sourceDirectories
- added deprecation mechanism for extractDuplicates and sourceDirectories
- added ConfigHelper to parse mojo configurations + two simple tests