standardize and clean indentation, remove empty lines
indendation cleanup part 2, remove trailing spaces
space cleanup part 3
remove loop that causes invalid output
dealing with no identifier without making invalid pbcore
handle empty digital locations
specify that getWebPath('original') is a "URL" in identifierSource
reorder instantiation elements
handle another case of empty 'Digital Location'
remove 'Digital Location' from mapping to instantiationIdentifier

it's already mapped to instantiationLocation
update show.pbcore.php to changes in browse.pbcore.php
comment out coverage (doesn't work with omeka 2 yet)
Merge pull request #1 from dericed/master

indentation cleanup and better handling of empty elements