Changed use of password Strings to 'Secret'.
Updated Exceptions + Exception Chaining. 
Changed use of password Strings to 'Secret'.
Added return values to addCertificate(...) methods.
Updated CertificateStore test methods.
Added extra assertion to test whether url is null.
Added Testers for Presentation.
Added src directory to test classpath.
Changed ClasLoader.
Fixed test.classpath bug. Must add 'testsrc' to test classpath.
Upgraded to: RC1b: Release Candidate 1b.