Greatly improved the scale finding algorithms to include real margins, orientation identification, and to not be a pile of copy-pasted code.
Moved scale finding algorithms to the Airport class where they belong.
Added pixel conversion methods.
Added stubs with pseudo-code for finding base latitude and base longitude, which are needed for the pixel conversions.
Made getTextPDFBox() a static method because it is always used from a context where static methods make sense.
Added documentation for the findBaseLatitude/Longitude() methods, which I forgot to do last time.
Added the parameters for the findBaseLatitude/Longitude() methods, which I forgot to do last time.