Merge pull request #157 from creature/event-admin-tweaks

Add counts for coach spots and attendee numbers
Details of what each gem is used for, to help beginners to the project.
show waiting list, limit workshop RSVP to 3.5hrs before workshop begins
update dependencies
fix locale issue
update restriction time on changing rsvp and notification message
Merge pull request #158 from despo/fix-times

Fix workshop time
update attendances view
don’t display sponsor log on workshop admin listing
codebarHQ -> codebar
Merge pull request #159 from despo/update-twitter-references

codebarHQ -> codebar
improve organiser listing on chapter view
only display 15 latest sponsors on main page
display testimonials
extra testimonials to model
move testimonial haml to partial
fix latest scope test
update reminder rake task to work with 
workshop time attribute being updated
Merge pull request #160 from despo/sponsors-and-testimonials

Sponsors and testimonials
change string field to text
change retrieving latest sponsors
not uniq!
change default scope of retrieved sponsors