Updated version number to 1.23
Changed to correct handling for
Changed to correct handling for the languagecode again, now all should be fixed
Use of 12 months Partpayment for calculate pay from value - fix #6. A fix for fix #2 regarding invoice_fee to check if is_object and object exists. Also fixed a tiny error in Shortcodes. This is from commit 8fe3d93
Merge branch 'release-1.23' into develop
Added all the functions and bug fixes from release-1.23 into develop.
The functions was added due to that one pull request was added to the old hotfix-1.22.1 branch