Reformat Search page headings

OME-DCO-1.1-Signed-off-by: Sebastien Besson <seb.besson@gmail.com> (github: sbesson)
Restructure omero.api.Search table using list-table

OME-DCO-1.1-Signed-off-by: Sebastien Besson <seb.besson@gmail.com> (github: sbesson)
Unify markup in Search with the rest of the documentation

- Wrap lines after 78 charachters
- Use file and envvar markups when possible
- Use $ as the leading character for UNIX command lines

OME-DCO-1.1-Signed-off-by: Sebastien Besson <seb.besson@gmail.com> (github: sbesson)
Add percent indexed SQL command to the Re-indexing section

OME-DCO-1.1-Signed-off-by: Sebastien Besson <seb.besson@gmail.com> (github: sbesson)
merge dev_5_0 -D org: PR 819 (12311 auto memory docs)
merge dev_5_0 -D org: PR 820 (OMERO Developer doc tidying)
merge dev_5_0 -D org: PR 826 (Search page tidying up)
merge dev_5_0 -D org

Repository: openmicroscopy/ome-documentation
Updating c858dcf..3846667
Merged PRs (fast-forward):
  # PR 821 hflynn 'Schema links'
  # PR 818 bpindelski 'Add LDAP error message explanation. (rebased onto dev_5_0)'
  # PR 813 ximenesuk 'Update DropBox documentation'
  # PR 811 will-moore 'Webgateway mip 5150'
  # PR 815 manics 'Remove mapannotations'
  # PR 804 hflynn 'Adding example server setup page '
  # PR 808 sbesson 'Travis fix'

Merged PRs:
  # PR 819 joshmoore '12311 auto memory docs'
  # PR 820 hflynn 'OMERO Developer doc tidying'
  # PR 826 sbesson 'Search page tidying up'

Generated by OMERO-5.0-merge-push#37 (http://ci.openmicroscopy.org/job/OMERO-5.0-merge-push/37/)