gnucash master: Multiple changes pushed

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/9fc6119d (commit)
	 via  https://github.com/Gnucash/gnucash/commit/bffb5d12 (commit)
	 via  https://github.com/Gnucash/gnucash/commit/4ad901f4 (commit)
	from  https://github.com/Gnucash/gnucash/commit/d8711619 (commit)



commit 9fc6119d228065b8ab371cb8c11fef6ca371d5f8
Author: John Ralls <jralls at ceridwen.us>
Date:   Fri Sep 23 18:28:03 2016 +0200

    See if setting TZ affects Travis tests.

commit bffb5d128387aa6268db7edf5a0e490fe9ae53f1
Author: John Ralls <jralls at ceridwen.us>
Date:   Fri Sep 23 18:26:43 2016 +0200

    Check the TZ env variable before defaulting to /etc/localtime.
    
    Note that only location-based timezones (e.g. 'America/Los_Angeles' are supported.

commit 4ad901f4cf42f8031c8c7e648dcfdf7ecdd25a55
Author: John Ralls <jralls at ceridwen.us>
Date:   Fri Sep 23 08:21:45 2016 +0200

    Fix several instances of wrong way to retrieve boolean from KVP.
    
    Extracted functions set_boolean_key and boolean_from_key to ensure consistency.



Summary of changes:
 .travis.yml                         |  2 +-
 src/engine/Account.c                | 94 ++++++++++++++-----------------------
 src/libqof/qof/gnc-timezone.cpp     |  7 ++-
 src/libqof/qof/test/test-gnc-date.c |  4 +-
 4 files changed, 43 insertions(+), 64 deletions(-)