PEP8
Export XML: emails visible only if user can edit

Also, added email-md5 hash.
Export HTTP API: email protection and md5 hashing
Protection granularity added to email XML export

Closes #64
API Mode with no AK, accept AK
Fixed submission of session1 value in reg form
Fixed RegForm Field File rendering when null
Fixed registration from binding with user data

* ng-init was wrongly used
* Fixed all the double binding for the form fields and sections. The form was not being filled with info from the registrant, when the user data (ajax request) took longer.
* Some form validation was not working (e.g. sessions 2 priorities)
* Cancelled social events were not displayed for old events (cancelled value for old events = 'old', new events = 'true')
Changed remove booking message

It was passing the wrong message
Wrong case in kwarg
Forgotten debug info
Fixed missing notification content type

Fix over 09235a1750d40031
PEP8 corrections
Bump zdaemon version

Returns status code on `zdaemon -C .. status`
Issue with >25 results returned by Vidyo

There was a default limit that wasn't being taken into account.
There are still issues caused by the fact that Vidyo is not doing a strict name check by default.
No-referral fix for LDAP
Vidyo: fixed issue when no rooms are returned
PEP8 recommended falsy checking (strings)
Timezone shown twice

Patch contribution by Stefan Hesselbach. Thanks!
Removed text about clear text passwords