Support logging the statistics of a type of object based on a partial
URI ("table:" will log statistics for all tables, "table:mytable" will
continue to log statistics for "mytable").

Includes a minor change: we now only log statistics for existing
handles, as opposed to actually opening the data sources if they aren't
yet open (the implementation changed to walk the list of open handles,
and that falls out of the implementation).
re-build all auto-generated files.
Release packages are available, note where in the README file.
Merge branch 'develop' into statlog-source-types

Conflicts:
	README
Merge pull request #492 from wiredtiger/statlog-source-types

Support logging the statistics of a type of object based on a partial URI.