Implement additional facilitators

[hans]

Implement additional facilitators as described in #95

[gnum]

(In [139]) References #96, facilitators can now be added to course. Still need to check it all again and see if everything is working well. NB! This will require additional table declared in edufeedr_tables.sql

[gnum]

(In [141]) References #96, small addition to prevent the ckicl event for ajaxified links

[gnum]

(In [142]) References #96, using same facilitators view for participants page facilitators block

[gnum]

Looks like it is done. Facilitators do not get added to the course as teachers - EduSuckr? does not know anything about them. These are only EduFeedr? local permissions tweaks.

NB! Hans: All that thing above means that those will not be shown on the social network diagram. If they need to be shown, then we would need to think how all that machinery should be changed to handle multiple facilitators using one blog. As of the moment we use logic every participant uses UNIQE blog. And that is used as an identifier for putting things together. Ticket is not closed until it is decided if something else should be done here as well.

[gnum]

Added the explanation to #95, closing the ticket.