Added a Button import
Merge pull request #2 from RyanW117/master

Added a Button import
Merge pull request #3 from EricSM/master

Added HelpfulLinks class
I changed the JavaMastersUI's Layout from GridLayout to Vertical Layout.
I also updated the NavigationMenu so that it is able to dropdown the
overviw, practice problems, and helpful links page and navigate to those
pages.
I changed the JavaMastersUI Layout from Grid to Vertical.  I made the
NavigationMenu have the drop down functionality.  And clicking on the
Overview, Practice Problems, and Helpful Links changes the centerPanel
Merge pull request #4 from EricSM/master

Added question menu
Merge pull request #6 from RyanW117/master

JavaMastersUI and NavigationMenu updated
Added PracticeProblem code. Also added first part of database logic.
Moved QuestionNavigation to components, since it is a component and not
a view.
Changed the UI so that the center panel can accept and display a Layout
or a Panel.
I changed the UI so that it can display either Layouts or Panels.
Merge pull request #7 from RyanW117/master

The UI can now display both Layouts and Panels
added an example of how to embed a video to helpful links