Add illustrations to .tiles

Add illustrations to the event organisers page.

Add the network pattern to the organisers page also.
Adding illustrations
Merge branch 'illustrations' into v2

Conflicts:
	source/images/illustrations/network.png
Add ticket illustrations

Add three illustrations to go in the ticketing section at the bottom
of the event organisers page.
Add tickets
Merge branch 'illustrations' into v2
Add new illustrations