gnucash-docs maint: Add screenshots of book options in help

[Frank H.Ellenberger]

Updated	 via  https://github.com/Gnucash/gnucash-docs/commit/af662264 (commit)
	from  https://github.com/Gnucash/gnucash-docs/commit/e903525f (commit)



commit af6622646f6e27fb8cca73189ecc47eb05f146af
Author: Frank H. Ellenberger <frank.h.ellenberger at gmail.com>
Date:   Mon May 13 16:50:06 2019 +0200

    Add screenshots of book options in help



Summary of changes:
 help/C/Help_ch_Customize.xml                   |  60 ++++++++++++++++++++++++-
 help/C/figures/Help_Book_Options_Accounts.png  | Bin 0 -> 23303 bytes
 help/C/figures/Help_Book_Options_Budgeting.png | Bin 0 -> 17913 bytes
 help/C/figures/Help_Book_Options_Business.png  | Bin 0 -> 64712 bytes
 help/C/figures/Help_Book_Options_Counters.png  | Bin 0 -> 50081 bytes
 5 files changed, 58 insertions(+), 2 deletions(-)
 create mode 100644 help/C/figures/Help_Book_Options_Accounts.png
 create mode 100644 help/C/figures/Help_Book_Options_Budgeting.png
 create mode 100644 help/C/figures/Help_Book_Options_Business.png
 create mode 100644 help/C/figures/Help_Book_Options_Counters.png