pulling event machine code from monkeypatch and triggering on config value
eagerly load em-http-request when they configure it to use it (to avoid them getting the error when any _other_ error occurs)
correct error logging
removing double log
Merge pull request #23 from JoshuaOSHickman/master

EventMachine support
upping version, update THANKS
bump multi_json dependency version (and rails development_dependency version). bump version number to 0.6.2