Implement completed field
Implement completed filter
Implement mark completed
Shorten the parser for deadlines. This uses some lookahead, so should be slightly more efficient than the previous pure backtracking parser.
Add the Task Priority value to the ADD_QUERY structure.
Implement priority parsing in the NLP parser.
Implemented specifying the priority of tasks when creating.
Make enums CamelCase.
TaskPriority enum should be CamelCase.
Use 'deadline' like the Query Engine.
Got rid of all 'due'
Implement parsing edit queries with priority.
Add the completion field to the list of fields we store in the edit query.
Fix some broken tests.
Specify that priorities should be changed.
Parse the DD-MM format. Year is inferred based on current time.
Lint fixes.
Lint fixes.
Fix broken test.
Merge pull request #150 from evansb/implement-state

Implement Marking Tasks as Completed