Fixed spelling error in getLabel javadoc

"lable" corrected to "label"
Merge #48

Thanks @JamesHealey94

commit 2062dd30c8a47000d008b8d0fa22de2a2f62dca7
Author: James Healey
Date:   2013-10-20 16:16:45 +0100

Fixed spelling error in getLabel javadoc

"lable" corrected to "label"