Time Blocks

This adds one core feature of ToDue: Time Blocks. They are organized in different timelines and will contain tasks that have been scheduled to be done in that specific time period. For now, the displaying of tasks has been removed, but this will come back in a future release.

Simple Todo App

This first release allows:

• adding of tasks
• editing tasks
• marking tasks as done
• deleting tasks
• setting/modifying a due date for each task