Added test script for executable documents
Added test script for executable documents

Requires running from source + pdflatex

Most errors will cause the script to fail.
Also checks PDF size, to catch other errors causing missing images.

minesense/VisTrails,VisTrails/VisTrails,hjanime/VisTrails,hjanime/VisTrails,minesense/VisTrails,hjanime/VisTrails,hjanime/VisTrails,minesense/VisTrails,VisTrails/VisTrails,minesense/VisTrails,VisTrails/VisTrails,hjanime/VisTrails,minesense/VisTrails,VisTrails/VisTrails,VisTrails/VisTrails