Send error code when couldn't get bib data

Means the Identify screen shows up red!
format
Merge pull request #254 from nla/hr-bibRecord-errors

Bib Record Details error message
adding docworks import and utility methods for determining naming and location of docworks folders.
AmberDB 1.1.31
change to actually find the ALTO files
fix error when fileName blank
Fix offset in Identify

and make changing the holding dirty the form
amberdb 1.1.34
add breaks before the bottom of the page
Merge pull request #255 from nla/hr-css

Fix offset in Identify
Merge branch 'master' into DocworksImport
Fix to use page.getCopy($COPYROLE) instead of iterating copies.
minor bugfix
Merge pull request #257 from nla/DocworksImport

Docworks import
Added more fields for TiffInFo. Update tests. Use a more comprehensive XML file example for testing.
Changed the Xpath expression for getting width and length of the image.
Merge branch 'master' into tiffheaderinfo