gem updates:

addressable
binding_of_caller
brakeman
ruby_parser
slim
code_analyzer
coffee-script-source
ffi
foursquare2
guard
guard-rspec
guard-spork
hashie
hike
jquery-rails
json
lastfm
listen
lumberjack
mail
mime-types
multi_json
multi_xml
oauth2
rails_autolink
rails_best_practices
rake
rspec
rspec-core
rspec-expectations
rspec-mocks
rspec-rails
ruby-progressbar
ruby2ruby
ruby_parser
sass
shoulda-matchers
slim
tilt
treetop
twitter
uglifier
zurb-foundation
updates for zurb foundation