RDF improvements

* RDF / Add aggregates to RDF export (#1188)
* encode character in rdf:about and rdf:resource
* add link to XML and HTML documents for CatalogRecord
Add OL style.css for minified js
Indexing / withheld element removed from index when user is not logged in eg. when increasePopularity task is launched (#1195).
Indexing / withheld element removed from index when user is not logged in eg. when increasePopularity task is launched (#1195).
Harvester / WxS thumbnail creation failure (#1197) and SQL error if user #1 removed (#1198).
Merge pull request #65 from fgravin/PR-OLcss

Add OL style.css for minified js
retargetted installer to master branch
#1200 Converter icons in metadata results are not displayed
Editor / gmd:protocol is not a closed list (#984)
Added missing foreign key constraints related to the status tables.
Fixed username size - should be 255 like the other databases.
Format files - Added NOT NULL to all the primary keys to make it consistent - Applied formating so that it similar to all database creation scripts.
Fixed bug with the harvestUri being set to 455 when it should be 512 like in the create scripts.
Fix bug with oracle column modification - wrong syntax - it was failing.
Move DDL from migrate default to db scripts as each DB can be different.
   - Updated oracle scripts to use varchar2 instead of varchar
   - Also fixed some missing defaults for users.security
Merge pull request #67 from ianwallen/master

various db script fixes
Merge branch 'protocol-PR' of https://github.com/fgravin/core-geonetwork
merge the improved search based on lucene 4.1.

Changes to use search manager NRT indexing and NRT facetted search.
Uses lucene 4.1-SNAPSHOT
removed accidentally merged method
ISO19139 / French loc / Fix wrong units in helper for spatial resolution.