Changed domain package structure, created Abstract repository
Fixed merge conflicts from moving packages

Merge branch 'master' of https://github.com/vaadin-marcus/bugrap

Conflicts:
	bugrap-ui/src/main/java/com/vaadin/training/bugrap/view/reports/ReportsOverviewView.java
	bugrap-ui/src/main/java/com/vaadin/training/bugrap/view/reports/ReportsOverviewViewImpl.java
	bugrap-ui/src/main/java/com/vaadin/training/bugrap/view/reports/ReportsPresenter.java