Merge pull request #28 from ngiger/master

Run tests again when calling mvn install
[2194] fixed invalid thread access when changing patient on bill summary
[2196] fixed class loading for beanshell scripting
[1386] make table of 'Briefauswahl' sortable
[1386] save 'Brief' access
[1109] Sorting in AssignStickerDialog
[2208] fixed selection of bills on detail view
[1971] fixed Kostenträger Platzhalter
[2203]new qualifier format
Updated readme
[2203]Use properties-maven-plugin to set timestamp_format
[2203]Set prefix to 'a' if building a snapshot
Ignore properties-maven-plugin in pom.xml to remove Eclipse build errors