gnucash master: Multiple changes pushed

[Geert Janssens]

Updated	 via  https://github.com/Gnucash/gnucash/commit/58b35eb7 (commit)
	 via  https://github.com/Gnucash/gnucash/commit/340b5a3e (commit)
	 via  https://github.com/Gnucash/gnucash/commit/96ce4258 (commit)
	 via  https://github.com/Gnucash/gnucash/commit/927342f2 (commit)
	from  https://github.com/Gnucash/gnucash/commit/d80bd038 (commit)



commit 58b35eb7cd3cdbc876045cfebaf25bd10ecca0e3
Author: Carsten Rinke <carsten.rinke at gmx.de>
Date:   Fri May 27 17:37:17 2016 +0200

    Bug763257 - add line charts to Income/Expense/Asset/Liability reports
    
    Adapt net worth linecharts to work correctly with jqplot's date axis

commit 340b5a3ece17e79c287b2ba6810e6f17925c785f
Author: Geert Janssens <janssens-geert at telenet.be>
Date:   Sat Apr 16 15:57:25 2016 +0200

    Restore proper formatting on the linechart highlighter

commit 96ce4258a44db75390d9283a5624d9725bb103d5
Author: Geert Janssens <janssens-geert at telenet.be>
Date:   Sat Apr 16 15:57:32 2016 +0200

    Bug763257 - add line charts to Income/Expense/Asset/Liability reports
    
    Fix date formatting for UK and locale choices.
    The fix works around what's most likely a bug in jqplot
    that it poorly interprets UK formatted date strings. To avoid
    the bug this patch will always pass ISO formatted date
    strings to jqplot for line charts. This is only applied to
    the liability chart for now and should be done for all other
    line charts as well.

commit 927342f2083267d57cf6c517ba6daade7b274498
Author: Carsten Rinke <carsten.rinke at gmx.de>
Date:   Tue Mar 8 19:30:10 2016 +0100

    Bug763257 - add line charts to Income/Expense/Asset/Liability reports



Summary of changes:
 src/engine/engine.i                               |  12 +-
 src/report/report-system/html-linechart.scm       |  76 ++++--
 src/report/standard-reports/category-barchart.scm | 280 +++++++++++++++-------
 src/report/standard-reports/net-barchart.scm      |  68 +++---
 src/report/standard-reports/net-linechart.scm     | 125 +++++-----
 5 files changed, 349 insertions(+), 212 deletions(-)