Rename test-projects/ to tests/
Remove Android Gradle dependency

It is neither used nor needed.
Upgrade gradle wrapper to 1.10
Set version to 0.3.0
Add onlyIf to uploadArchives task

Returns true if all sonatype configs are properly defined
Use published snapshot version for tests/single
Add tests to tests/single

This makes the sample test project consistent with the
documentation in how an ideal project should be configured for
stalker.
Set source compatibility to 1.7
Remove logging from ClassFileReader.java

- Add more logging to Usages.groovy
Replace looping check with simple .contains

The String check is performed on a HashSet where the key is also
a String.
Replace build/ with $buildDir/

Maintain consistency between documentation and sample projects in
tests/
Merge pull request #11 from jle/0_3_0

Fix test project