Added Table Column Headers

Added the JTable to a JScrollpane to allow for the headers to appear.
BugFix: Fixed 0 Values on PositionY of Bodies

Fixed assignment statement during construction of Body.
Bugfix: Created Scrolling Visual Window Using Mouse

There is a test oval being rendered to check scrolling.
Still needs zoom.
BugFix: Scaling (Not Fixed)

The bodies are now visible on the panel, but they are not scaled
appropriately.
BugFix: Jerky Panning Speed

Fixed issue where panning would gain momentum the more you scrolled.
The cursor starting point is now updated every time mouseDragged() is
called instead of using the old position from where the user first
clicked.
BugFix: Pane was cutting off plantets

Expanded the size of the panel statically to account for the size of the
furthest body.
BugFix: Clicking X on the DataWindow Did Not End

Added Default Close Operation
Code Cleanup

Removed console debug messages.
Merge remote-tracking branch 'origin/Bug-Fixes'