Prepare for release

Configure checkstyle top work from eclipse and CLI.
Add javadoc, soruces attachement.
Add javadoc to site generation.
Change emma to covertura in site genenration.
Format code.
Remove javadoc imports from source files (and add absolute links to
avoid reimport)
Fix typo in javadocs.

A "." was missing.
Fix Issue #8

Fix test failures: filtering calls by API level.
Fix Issue #8

Fix teste by filtering stringSet calls.