Added classpath, sources and libraries default values.

The lint mojo now handles default values for :

* sources
* classpath
* libraries

for this last parameter we need to resolve dependencies, hence the android:lint goal must be used during or after install phase. The command line to use the mojo becomes : 

````
mvn install -Dandroid.lint.skip=false android:lint
````

also, *I disabled html reporting by default*. I don't understand why this should be a default. Default for lint is to report on stdout and it's fine for the lint mojo as well, it really make more config necessary for continuous integration builds to have to disable html reporting (and renable xml reporting for the upcoming sonar lint plugin :) ).