gnucash master: Multiple changes pushed

[Christopher Lam]

Updated	 via  https://github.com/Gnucash/gnucash/commit/c77e1975 (commit)
	 via  https://github.com/Gnucash/gnucash/commit/10a0e5c1 (commit)
	 via  https://github.com/Gnucash/gnucash/commit/6b74f80b (commit)
	from  https://github.com/Gnucash/gnucash/commit/490b20d2 (commit)



commit c77e197570faa9fad829554fff41e6a7c66b83c0
Merge: 490b20d2d 10a0e5c16
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Fri Jan 24 07:13:48 2020 +0800

    Merge branch 'master-jqplot-redirect'

commit 10a0e5c166ce3705b5b3f3d374a6cca1d1fe2202
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Fri Jun 21 21:22:40 2019 +0800

    [html-bar/line/pie/scatter] guard all old api calls
    
    This commit guards old jqplot API calls being used with html-chart
    objects. Mainly useful for developers who are transitioning from old
    API to new API, providing error message instead of report crash.

commit 6b74f80bc36d5564183561e92914a80d7d85856b
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Fri Jun 14 21:26:52 2019 +0800

    [html-pie/scatter/bar/linechart] defer to html-chart renderer



Summary of changes:
 gnucash/report/html-barchart.scm  | 385 ++++++++------------------------------
 gnucash/report/html-linechart.scm | 371 +++++++++---------------------------
 gnucash/report/html-piechart.scm  | 205 ++++++--------------
 gnucash/report/html-scatter.scm   | 202 ++++++++------------
 4 files changed, 302 insertions(+), 861 deletions(-)