[FIX] LDAP search for users
[FIX] CS indexes initialization dependency
[FIX] E-mail user indexing - add to conference

 * If user was registered in a conference before having an account (same e-mail), his/her identity will be automatically tied to the registration in question;
[FIX] Remove awful table width constraint
[FIX] Failure when enabling RB plugin

Fix bug introduced in 39db41f8; dbi is None but the check was missing
[FIX] Explicit db commit calls

Add final dbi.commit() calls when the loop before committed every N
records. This might not be necesasry since chances are good there's a
commit somewhere in the calling code but it's cleaner - otherwise some
of the function's data is committed right inside but the last few
items aren't.
[FIX] Pillow instead of PIL in setup.py

9b544a2 switched from PIL to Pillow but setup.py still referenced PIL.
This causes both to be installed which is a bad idea:
"PIL and Pillow currently cannot co-exist in the same environment"
[MIN] PEP8, obsolete/unused variable
[FIX] Deprecation warning in IPython 1.0+
[FIX] Attach vidyo room PIN fields

- The new booking will take the original booking PIN not taking into account the one set in the form.
- Closes #1455
[FIX] Run indico shell inside Flask app context
[FIX] Support URL generation without req context

Uses BaseURL, so if http+https are used the urls will always point to
the http:// version
[IMP] Added Pagedown Editor and Previewer to abstract submission
[IMP] Added Markdown and MathJax integration to abstract submission, editing and viewing
[IMP] Pagedown and MathJax in external modules

 * Also included proper assets in headers
[IMP] Better looking preview
[FIX] Added the remaining Markdown editing and rendering in abstracts and contributions, cleaned some code
[IMP] First work on LaTeX PDF generation, not finished and still buggy
[IMP] LaTeX PDF generation on Abstracts and Contributions
[IMP] LaTeX PDF generation on User Abstracts Book