DS-1483 Generate citation_pdf_url in more cases

Google Scholar uses the citation_pdf_url header tag on item pages to determine
which of an item's bitstreams to link to (if any). Standard DSpace behaviour is
to include this link only if the item has exactly one bitstream in the ORIGINAL
bundle and if this item is of type application/pdf. The desired behaviour for
the LCoNZ IRRs is this:
 - if the item has only one bitstream in the ORIGINAL bundle, link to this one
 - if the item has a primary bitstream in the ORIGINAL bundle, link to this one
   (regardless of how many bitstreams there are in total in the ORIGINAL bundle).
Additionally, the bitstream link should only appear when the bitstream selected
according to the rules above is publicly visible.
The mimetype of the bitstream is not taken into account, as per Google Scholar
feedback that this is no longer as important to them.
Minimal redesing to uniform to the xmlui, add datepicker js on embargo date, limit policy name field to maxlength=30
Add support in review page for access settings
jspui bootstrap layout minor tweak
Move code into more appropriate jsp, manage submission when embargo feature is off
[DS-1621] First stab at configurable search for Item mapper
[DS-1788] Update command names and descriptions
DS-1800 Bootstrap: Home page - sidebar news doesn't fill all the available space
DS-1770 Bootstrap JSPUI - When viewing a 'full item' the top border of the last row 'Appears in Collections' should continue until the end of the column
DS-1772 Bootstrap JSPUI - When editing an item there is an extra empty row at the bottom of the table resulting in a partial border
Layout cleanup, harmonize browsers behaviour
DS-1774 move hardcoded text to i18n
display error screen when no workspace item exists or no workspace item is selected
edit comments
Consistent use of bootstrap + use of EL to avoid escape quote issue in taglibrary with tomcat7
Move the retrieve resource policies and other info to the servlet
Change from submission attribute to request attribute
Change way to retrieve data
Changed way to retrieve object from submission map to request attribute, remove code to show number of policies setting in the case of simple embargo form
DS-1676 Impossible to cancel/save or go back in the upload step with upload progress bar enabled