Merge tag 'v1.6.0'

[maven-release-plugin]  copy for tag v1.6.0
Merge tag 'v1.6.1'

[maven-release-plugin]  copy for tag v1.6.1
Updated version number to 1.7.0
Fix for rounding item issues
	Fixed rounding to stop creating a new price each time the rounding was used.
	Added script to remove old rounding prices (that are never used) and just add a single one.
^cash-106 Fixed
Updated the bill save click event to properly call the saveBill function.
	- ^cash-107 Fixed
[maven-release-plugin] prepare release v1.7.0
Merge tag 'v1.7.0'

[maven-release-plugin]  copy for tag v1.7.0
Fixes issues with rounding line item having the incorrect order and updates UI to display invalid data correctly.
	^cash-126 Fixed
[maven-release-plugin] prepare release v1.7.1
Merge tag 'v1.7.1'

[maven-release-plugin]  copy for tag v1.7.1
Fixes Null reference bug when trying to determine the value of a concept payment mode attribute.
	^cash-129 Fixed
[maven-release-plugin] prepare release v1.7.2
Merge tag 'v1.7.2'

[maven-release-plugin]  copy for tag v1.7.2
Merge branch 'master' into 1.x

Conflicts:
	api/pom.xml
	omod/pom.xml
	pom.xml