Improve resolution on qr codes
Add warning about files left in /tmp for Unix systems.
Mention deleting /tmp/doc*.pdf instead of just checking /tmp
Adding a tamper-evident sticker version of the Psy design
Removed stray trailing whitespace
Merge pull request #4 from DavidGriffith/master


	DavidGriffith	 Improve resolution on qr codes	 1fae726

DavidGriffith	 Add warning about files left in /tmp for Unix systems.	 44bc1b4

DavidGriffith	 Mention deleting /tmp/doc*.pdf instead of just checking /tmp	 1cd570c

DavidGriffith	 Adding a tamper-evident sticker version of the Psy design	 80328c8

DavidGriffith	 Removed stray trailing whitespace	 d1c0cd0