[FIX] Webcast/Recording request warning fix

 * Only show warning when "All * talks" is selected
[FIX] `zope.index` - don't use latest version

 * zope.index 4 will include the new `persistent` package, which only works with ZODB 4
 * also removed i18n'd DB string
[MIN] Added tags for notif_tpl

added tag 'abstract_session' and 'contribution_url'
[MIN] Added primary and co authors to http api export
[FIX] Missing URL in requirements.txt
[FIX] Escape quotes in search box
Fix some french localisation issues
Fix a typo (inmediately => immediately)
[FIX] Delete conference trigger for outlook plugin
[FIX] Do not include Export.js twice

fixes #1237
Merge branch 'v1.0'