SQL:
- Removed the taskId field. Will now create a task with a taskId of -1. On first load of the entire Task table, will populate the taskId field with the _id field.

DisplayMessageActivity:
- Added views
- Can now create tasks via views and add to the database
- Restarts the main activity when creating a new task

MainActivity:
- Removed old debug statements
- Closes activity when transitioning to DisplayActivity

General:
- Cleaned up miscellaneous warnings