update to rails4 and bump needed gems, adapt application and routes
temp commented attr_accessible
adjust configuration to new rails4 standards
use secret_key_base instead of secret_token
use strong parameters for user
removed link_to_function
replace launch icon with icon-rocket
add turbolinks
add more configs to production as in rails4
activate turbolinks
add jquery turbolinks
difference user params for admin and others
replace better_logging with pretty_formatter
remove quiet assets
Merge branch 'rails4'