Merge remote-tracking branch 'origin/master' into topic/documentation
Merge remote-tracking branch 'origin/master' into topic/documentation

Conflicts:
	doc/index.rst
Expanding on records, including two simple examples.
Include required blank line after btest directive to avoid python error.
correct nomenclature for fields in a record.
Renamed Advanced Data Structures to simply Record Data Type.
Start on Logging Framework.
Correction of spelling mistakes.
Logging Framework (contrived) example:  Logging factorials.
Changes to framework_logging_factorial_02.bro to make the call to Log::create_stream() more distinct.
Include a brief description of what &log does.
Split logging via Filters in the Logging Framework.
Spelling fixes.
Hooking into the Logging Framework.
Typo fix and baselines for hooking the log framework.
Merge remote-tracking branch 'origin/master' into topic/bernhard/hyperloglog

Conflicts:
	src/bro.bif
Moving the quickstart guide back in.
and re-add a function that I apparently deleted accidentally
Merge remote-tracking branch 'origin/topic/seth/metrics-merge' into topic/bernhard/hyperloglog-with-measurement
Restructuring the main documentation index.

I'm merging in the remaining pieces from the former doc directory and
restructuring things into sub-directories.