Merge pull request #156 from serso/master

fix for incorrect version of com.google.android.licensing:play-licensing...
fixed issue with changed version in sdk causing dependency not found, see https://github.com/mosabua/maven-android-sdk-deployer/issues/158
upgraded parent pom version
upgraded Android Maven Plugin and added enforcer rule to make sure Maven 3.1.1 is used
changing back to dep version 2.0.0 as resulting from new sdk install
added file wagon for maven repo copy to work and updated webdav wagon to same version
moved modules into a default activated 'all' profile and made platform specific modules ONLY use platforms module
adding add-ons to platform profiles
added 2.4.0 changes
doc updates
upgraded to 2.4.0
Updated Android SDK component versions
Merge pull request #163 from Shusshu/feature-update-version

Updated Android SDK component versions
Removed reference about letter in version since this no longer applies