Add NavX, at USERLIBS_DIR/navx_frc.jar, to .classpath

This will work on all laptops on which the library is
*properly installed* (i.e. to wpilib/user/java/lib/).

Installation resources for both Windows and *nix can
be found in ./README.md

Author: WilsonBerkow

.classpath

@@ -8,5 +8,6 @@
 	<classpathentry exported="true" kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
 	<classpathentry exported="true" kind="lib" path="lib/stuyvision.jar"/>
 	<classpathentry exported="true" kind="var" path="USERLIBS_DIR/CTRLib.jar"/>
+	<classpathentry exported="true" kind="var" path="USERLIBS_DIR/navx_frc.jar"/>
 	<classpathentry kind="output" path="bin"/>
 </classpath>