PROV-750 First attempt to fix this Zend_PDF label printer issue

There were a couple of problems:
1) There is no setDash() function anymore
2) setLineWidth() requires a float parameter, values like “1px” result
in an exception. We now calculate or extract the pt value from text
values like “1px” or “1pt”.
3) The drawRectangle() function always fills the rectangle and doesn’t
allow for transparent fillings. We now draw the border by drawing the 4
lines by hand.
Merge branch 'master' of github.com:collectiveaccess/providence