ID #964 Add option to create traceability/version report
https://sourceforge.net/p/oscarmcmaster/feature-requests/964/
In this version, the downloadable files are not physically created, the
generated data is piped from input to output stream for download purpose

ID: #2862 OSCAR Messenger - Perscription Information Attached to Message Cannot be Viewed
https://sourceforge.net/p/oscarmcmaster/bugs/2862/

Change-Id: I3c3cb756ee4b25917bb73d85cb12a40a98453093

Conflicts:
	src/main/java/oscar/util/Doc2PDF.java
	src/main/webapp/oscarMessenger/generatePreviewPDF.jsp