gnucash master: Multiple changes pushed

[Christopher Lam]

Updated	 via  https://github.com/Gnucash/gnucash/commit/8d47622a (commit)
	 via  https://github.com/Gnucash/gnucash/commit/945c11e2 (commit)
	 via  https://github.com/Gnucash/gnucash/commit/c68f2828 (commit)
	from  https://github.com/Gnucash/gnucash/commit/3d931511 (commit)



commit 8d47622ab6e9ffe6e59effad90fd0b4f03b023a1
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Thu Jun 25 09:00:35 2020 +0800

    [advanced-portfolio] move table-add-stock-rows toplevel

commit 945c11e2b12fc19809ca1173e202987431789431
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Wed Jun 24 11:09:05 2020 +0800

    [advanced-portfolio] simplify basis functions

commit c68f28286117cf57c104db7ebf7bfc7705c19612
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Wed Jun 24 10:36:00 2020 +0800

    [advanced-portfolio] simplify basis-builder
    
    and use scheme division which is more accurate than
    gnc_numeric_div. tests need to change slightly.



Summary of changes:
 .../report/reports/standard/advanced-portfolio.scm | 1353 ++++++++++----------
 .../reports/standard/test/test-portfolios.scm      |    8 +-
 2 files changed, 659 insertions(+), 702 deletions(-)