Fix for problem with organization hierarchy
Refactor hierarchical organizations

The module was getting old ;)
Only responsible user can start the task.
Dates when buttons "Rozpocznij" and "Zakończ" are clicked are stored in the database.
After finishing task you can't click on "Rozpocznij" again.
After volunteer application is accepted by Administrator, he gets mail.
Admin gets message about every application. Coordinator gets mail about every application accepted by admin.
NIP is not required.
Bold font for skills and wishes.