add tests for development data

add core data tests

add test target and some asset tests

fix a bug where EditProjectView won't update when closed or reopened

implemented MVVM on ItemRowView

implemented MVVM to HomeView

implement MVVM on ProjectsView

Organized project files

add some comments and documentations.

lint the code

delete project will also delete all its items, using cascade; use NSCompoundPredicate to only show incomplete items in open project

clean up HomeView, ProjectsView, EditProjectView, made them more readable.

clean up HomeView, ProjectsView, EditProjectView, made them more readable.

added VoiceOver support

Internationalized, localized into Hungarian.