remove event sponsorship spec
event and meetings can have coaches
move find_cities to ApplicationController
make avatars a bit smaller
show attending coaches in meeting page
show all meeting sponsors in meeting pages
order events by creation date
restrict event parameters
use lambda in default_scope
add coachable to event and meeting

add nested city event/show route 
to make it easier to link to coachable from coach pages
extra coachings and non-coachings to partials
style coach page
default meetings and events to coachable
extract coaches and sponsors to partials
and reuse for meetings

rename admin shared partials
redirect to previous path after assigning coach

test coaching
remove unnecessary notice rendering 
(already handled by layouts/_messages)

display better message when adding coach
make name and email mandatory for a coach
extract sponsoring and not-sponsoring to partials
remove tables
remove table from coaches index
make admin/event consistent with other pages
link sponsors to their website