Refactored DeckVotingPanels to follow comment/coding standards
Fixed the java.lang.Long exception when retrieving a user input non-float value for a session estimate
MouseOver actions on cards in the vote panel highlights the moused-over card
Made the estimation cards actual, open-source playing cards provided by Mike
Ensures the user entered a non-negative number for their estimate if there
is no deck.
The error message fails to display though.
Removed unneeded instances of this in the DeckVotingPanel
Refactor of DeckVotingPanel.java
Fixed errors in the highlighting card code for the voting subpanel
Merge pull request #96 from TheTeam8s/feature-votingDeckSubPanel

Feature voting deck sub panel
Make voting panel used for no deck more aesthetically pleasing
can use better gui for estimating a requirement when the no deck option is chosen
more unified GUI for estimating a requirement without a deck
resolve merge conflicts