Begin migration of Requirement storage to ID

This code is buggy; needs debugging.
Add empty Requirement as default choice in combo box
Fix some bugs
Merge branch 'develop' into bugfix-105-migrate_requirement_storage_to_id

Prepare for pull request.

Conflicts:
	TaskManager/src/main/java/edu/wpi/cs/wpisuitetng/modules/taskmanager/view/tasks/AbstractInformationPanel.java
	TaskManager/src/main/java/edu/wpi/cs/wpisuitetng/modules/taskmanager/view/tasks/ViewTaskInformationPanel.java
Change indentation to be like that of 'develop'
Fix indentation
Fix Medium flags for final variables
Merge branch 'develop' into bugfix-105-migrate_requirement_storage_to_id

Deleted the TaskEntityManager.java in models, according to develop.

Conflicts:
	TaskManager/src/main/java/edu/wpi/cs/wpisuitetng/modules/taskmanager/models/TaskEntityManager.java
	TaskManager/src/test/java/edu/wpi/cs/wpisuitetng/modules/taskmanager/models/TaskTest.java
Merge branch 'develop' into bugfix-105-migrate_requirement_storage_to_id

Prepare for pull request.

Conflicts:
	TaskManager/src/main/java/edu/wpi/cs/wpisuitetng/modules/taskmanager/view/tasks/ViewTaskInformationPanel.java
Merge pull request #106 from R2-Team2/bugfix-105-migrate_requirement_storage_to_id

Bugfix 105 - Migrate Requirement Storage to ID numbers