Beautified the universe generation and display. Note that ship ranges are waaaay inadequate for these planet distances.
Streamlined the data manager class and added key constants to data types.
made methodsto buy and sell in transaction class
fixed merge issue with new data manager in transaction class
Started working on the marketplace. Created a custom control for buying/selling.
Finished implementing buy and sell methods as well as their validate versions in transaction class
Merge branch 'master' of https://github.com/gem-5/last-adventures into creston/dev
Added a planet screen. Added more stuff to the market place. Re-did some fxml  in a failed attempt to fix the resizing bug.
Merge branch 'master' of https://github.com/gem-5/last-adventures

Conflicts:
	src/main/java/edu/gatech/gem5/game/Character.java
	src/main/java/edu/gatech/gem5/game/Ship.java
Fixed merge bugs.