* make pytest_eventlog.py work again by adding a hack to the registry, rename
* disable resultdb hook plugin, it needs merging with resultlog
* add some docstrings, streamline bits
--HG--
branch : trunk
this merge contains:
* a new plugin architecture
* a pluginized pytest core
* many pytest related refactorings
* refactorings/streamlining of pytest's own tests
--HG--
branch : trunk