Add quotes to filename for spaces and pdftk-1.45 multi-char handles, direction name changes

Two changes here, maybe need to be branched.  First and foremost, add single-quotes to filename so spaces in paths/files are handled.

Second change set incorporates pdftk-1.45 new multi-char handles - this implementation allows 26^2 handles.  Lastly, rotation changes from N E S W to north east south west.

http://www.pdflabs.com/docs/pdftk-version-history/