Implemented Task Manager with several helper classes, fixed failing unit tests
Upgraded Gradlge build system
Refactored code to pull tasks directly from task manager and not redraw the list view everytime
Added new test, fixed failing tests
Changed linear to relative for edit text and add button
null check on adapter
Refactored Task Manager and Expandable Task Adapter, more clean
Created hashtag manager, hashtags now are synced with the drawer when tasks are created, updated, or removed. Refactored Task to use list for hashtags
Fixed Failing unit tests