* Internal error conditions now raise IndieAuthException
* Bubbled unknown exceptions converted to generic IndieAuthException
* Exceptions passed to overridable handler, turned into response
* Wrote many more tests, fixed a variety of problems
* Created corresponding templates
* Changed how Server configuration works
* Ensured that rauthorization approval requests verify their indieauth parameters
* Wrote first passing test for Server, fixed a variety of small errors along the way
Made some minor tweaks and improvements to the utility classes
Required some new dependencies
Server::__construct now takes a single config array as the list of
parameters was getting rather long.
Sketched out first draft of how the library should work, stubbed
a lot of the smaller utility classes required, and outlined the
main handler functions for the IA Server.
