New history tab view branch.
Set up HistoryObject class
History View layout is changed
Added border and layout manager to HistoryObject.

Signed-off-by: Arica Liu <aricaliu@wpi.edu>
Fixed Jenkins
History View is scrollable
Fixed problem where History Objects filled whatever space they could.
Editable RequirementPanel fields don't scale with the RequirementTabsView.
Still need to fix the scrolling issue with RequirementTabsView.
HistoryView is now working!

Signed-off-by: Arica Liu <aricaliu@wpi.edu>
switched history view to use JList
Minor Changes
We called the Historical Change Diff function from RequirementStore in the Update function. This broke the tests, but it's not on Jenkins and Sam L needs our code, so w/e.

Collabs:
Evan Polekoff
Same Abradi
Michael French
Implements HistoricalChange objects
history log gets history for each requirement
Added functionality for sub requirements as Integers. The tests have been fixed based on this and have all pased. I don't remember how much else was added, but we've been here for a while >_<

Evan Polekoff
Sam Abradi
Michael French
Merge remote-tracking branch 'origin/team1-doesTheHistoryLogWork' into team1-history-view

Fixed Conflicts and Bugs.
History Log Updates on Load
Prettier list
Saves to database for realz.
Changed order of HistoricalChanges in the list
Merge remote-tracking branch 'origin/team1-history-view' into team1-dev

Conflicts:
	RequirementsManager/src/edu/wpi/cs/wpisuitetng/modules/RequirementsManager/History/HistoricalChange.java
	RequirementsManager/src/edu/wpi/cs/wpisuitetng/modules/RequirementsManager/entitymanager/RequirementStore.java
	RequirementsManager/src/edu/wpi/cs/wpisuitetng/modules/RequirementsManager/models/Iteration.java
	RequirementsManager/src/edu/wpi/cs/wpisuitetng/modules/RequirementsManager/models/Requirement.java
	RequirementsManager/src/edu/wpi/cs/wpisuitetng/modules/RequirementsManager/requirements/RequirementPanel.java
	RequirementsManager/src/edu/wpi/cs/wpisuitetng/modules/RequirementsManager/requirements/RequirementView.java
	RequirementsManager/src/edu/wpi/cs/wpisuitetng/modules/RequirementsManager/requirements/tabs/RequirementTabsView.java
	RequirementsManager/test/edu/wpisuitetng/modules/RequirementsManager/historylog/TestHistoryLog.java

Signed-off-by: Tushar Narayan <tusharnarayan@gmail.com>