added aar as supported extension
added aar lifecycle mappingn and artifacthandler for aar initially as copy of apklib
a bit more stuff for aar support done .. just copied apklib setup for now
adding aarmojo as copy of apklib mojo for starters
Updated to Builder 0.5.1
Builder 0.5.4
if nativeArtifactFile and target refer to the same file, skip copying nativeArtifactFile to target.
builder 0.5.5
Support for maven property maven.test.error.ignore
Oops
Adapt AarMojo to include the compiled classes as classes.jar
Add AAR as an Android Project type
0.5.6
Use .aar step 1
Prepare R.txt (still need to convert the java into what is supposed to be in txt)
Use of constants instead of hardcoded string
fix from cherry-pick
Fix: Prevent duplicate native library names in generated makefile

+ Can happen when multiple so files with different
  classifiers are used as dependencies
Fix: Ignore native libs not meant for current TARGET_ARCH_ABI

+ If a classifier exists, we use it as the ABI identifier
Added R.txt