Add support for creating dummy certificates, servers, etc. when testing

Currently, all testing seems to be done with static certificate chains which were created for that test from the command line. It would be more streamlined to be able to create your own instances in the test code itself. Issue #96 references a similar problem and suggests the ability to create a test server. Ideally, one should be able to create a dummy version of anything they might need in a test. If you need something besides certificate chains and servers, please say so in a comment.