gnucash maint: Multiple changes pushed

[Christopher Lam]

Updated	 via  https://github.com/Gnucash/gnucash/commit/34bb47e2 (commit)
	 via  https://github.com/Gnucash/gnucash/commit/bf202d14 (commit)
	 via  https://github.com/Gnucash/gnucash/commit/621c857b (commit)
	from  https://github.com/Gnucash/gnucash/commit/2684e51d (commit)



commit 34bb47e23f9beacf1d219b4fd7a7868d9d131ad4
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Tue Oct 1 00:06:48 2019 +0800

    [income-statement] compact functions

commit bf202d14614aa8bc7bdde063851f345ceb15101f
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Mon Sep 30 23:50:08 2019 +0800

    [income-statement] use collector arithmetic, define vars in formals

commit 621c857b6a3df6a75b390f9cad6838dd80ea5db4
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Mon Sep 30 23:36:59 2019 +0800

    [income-statement] remove dead code, compact function
    
    column and balance were unused. compact function.



Summary of changes:
 .../report/standard-reports/income-statement.scm   | 439 ++++++++-------------
 1 file changed, 166 insertions(+), 273 deletions(-)