gnucash master: Multiple changes pushed

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/5da3bf79 (commit)
	 via  https://github.com/Gnucash/gnucash/commit/3e442a0e (commit)
	 via  https://github.com/Gnucash/gnucash/commit/0403e490 (commit)
	from  https://github.com/Gnucash/gnucash/commit/f1ff7896 (commit)



commit 5da3bf79434df06735e2d2e4ba2fc54d4182a9bb
Author: John Ralls <jralls at ceridwen.us>
Date:   Tue Jan 22 21:29:24 2019 -0800

    [QofLog] Replace hashtable with tree of vectors.
    
    16x speedup.

commit 3e442a0ef9316f9bb6d2f3a9ee49a211e89dd1c6
Author: John Ralls <jralls at ceridwen.us>
Date:   Tue Jan 22 14:10:39 2019 -0800

    Make qof_log_set_file static.
    
    Used only internally.

commit 0403e4906c8c8697c7a5ed144e8834ea146ba305
Author: John Ralls <jralls at ceridwen.us>
Date:   Tue Jan 22 08:47:14 2019 -0800

    Move QofLogModule typedef to qoflog.h where it belongs.



Summary of changes:
 libgnucash/backend/xml/test/CMakeLists.txt |   2 +-
 libgnucash/engine/qofid.h                  |   2 -
 libgnucash/engine/qoflog.cpp               | 150 +++++++++++++++++------------
 libgnucash/engine/qoflog.h                 |   2 +
 4 files changed, 92 insertions(+), 64 deletions(-)