create add task view stub
add insert listener
add stub for createTask function
replaces task type tables with views, reformat sql file
fixed pragma case
create ViewStack
add toString in task
chaged tabs
create task states
create task states make
add test for method plan
task is shown in listview after adding
move class Util to package util
add listener for task update
replace listener interfaces with observable implementation
fixed generated keys
fixed on update listener notification
create planned task
create separete function to insert/update reminder
split test into different classes + fix NPE in Task class