Display active tasks by default, and allow the user to display completed/all/active tasks
Fix #100 and #109: Sort by due date and start date together, and sort floating tasks at the bottom.
Clean up
Merge branch 'emmeryn-#109-sort-floating-below'
Clean up.
Clean up
Modify search to only search active tasks by default. The user can specify whether to search completed or all tasks in the command.
Clean up search.
fix tests
Fix tests
Merge remote-tracking branch 'origin/pn-default-active'
Merge branch 'master' of https://github.com/cs2103aug2014-w13-4j/main into emmeryn-#113-do-not-show-year-if-this-year

Conflicts:
	src/main/views/TaskListView.fxml