Commited, so I can merge.
Merge branch 'master' of https://github.com/gem-5/last-adventures
Added price to gadgets. Can now calculate Ship & Human net worth.
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.