ReflectedUniverse: log with LogService, not SLF4J
DebugTools: remove obsolete enableLogging method

With the SciJava LogService, we no longer need this functionality.
io.scif.formats: log with LogService, not SLF4J

This change covers most formats, but there are a couple of
hold-outs which have more complications before switching over.
Location: remove obsolete HACK comment
Location: log with LogService, not SLF4J
AbstractChecker: log with LogService, not SLF4J
AbstractMetadata: log with LogService, not SLF4J
AxisGuesser: log with LogService, not SLF4J
FilePattern: log with LogService, not SLF4J
LocationService: log with LogService, not SLF4J
RandomAccessInputStream: log with LogService, not SLF4J
WIP: BaseHandler: log with LogService, not SLF4J

This commit sucks...
WIP: LOGGER -> log()