[TR] New TR2-4 manual available in PDF

[Randall]

Thanks to Dr. Scott Hall for sharing his hard work with us.  I've just cleaned things up a bit, added back a few missing pages and
so on.  Should be text searchable.

Sorry the file size is so large, not sure what happened.

https://drive.google.com/file/d/0B2H2NJt34OffM2xJeDVPbkRMSWs/view?usp=sharing

As always, if you find a problem, let me know.  I think I found all the pages with the scale messed up, but I might have missed a
few.

-- Randall