gnucash unstable: Release GnuCash 2.7.3

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/ac05578b (commit)
	from  https://github.com/Gnucash/gnucash/commit/0c6e2ebf (commit)



commit ac05578ba5e7d716e367c6952f1d681f590ea3b7
Author: John Ralls <jralls at ceridwen.us>
Date:   Sat Dec 30 15:45:22 2017 -0800

    Release GnuCash 2.7.3



Summary of changes:
 AUTHORS        |   1 +
 CMakeLists.txt |   4 +-
 ChangeLog      | 886 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 NEWS           | 119 ++++++++
 configure.ac   |   2 +-
 5 files changed, 1002 insertions(+), 10 deletions(-)