Added Checker.java (unused)

-Removed some unused code from PAXChecker.java
-Added Checker.java
--Will manage website checking
--Will contain GUIs
--Cleans out PAXChecker.java (more concise)
Almost finished integrating Checker.java

-Made Browser.java not print a blank line if the Status window was null
-Made Checker.java use its own methods (originally copied over from PAXChecker.java)
-Moved tickets found code into a single method
-Made code point to Checker.java instead of PAXChecker.java where appropriate
Finished integrating Checker.java

-Made Checker.java manage setting GUI text
--Removed tons of unnecessary nullchecks from other classes
--Removed tons of unnecessary direct references to Checker.java class variables
-Added methods to Checker.java
--Mostly GUI management
-Removed more unnecessary methods and variables from PAXChecker.java
-Canged version to 1.7.2.4