Use slim and js for rails g and remove now unused coffee-rails dependency

Gemfile

@@ -4,7 +4,6 @@ gem 'activerecord-jdbcpostgresql-adapter', platform: :jruby
 gem 'bcrypt'
 gem 'bootstrap-will_paginate'
 gem 'carrierwave'
-gem 'coffee-rails'
 gem 'concurrent-ruby'
 gem 'concurrent-ruby-ext', platform: :ruby
 gem 'activerecord-deprecated_finders', require: 'active_record/deprecated_finders'
@@ -28,7 +27,7 @@ gem 'ransack'
 gem 'rubytree'
 gem 'sass-rails'
 gem 'sdoc', group: :doc
-gem 'slim'
+gem 'slim-rails'
 gem 'bootstrap_pagedown'
 gem 'pagedown-rails'
 gem 'sorcery'

Gemfile.lock

@@ -316,6 +316,10 @@ GEM
     slim (3.0.9)
       temple (>= 0.7.6, < 0.9)
       tilt (>= 1.3.3, < 2.1)
+    slim-rails (3.1.3)
+      actionpack (>= 3.1)
+      railties (>= 3.1)
+      slim (~> 3.0)
     sorcery (0.11.0)
       bcrypt (~> 3.1)
       oauth (~> 0.4, >= 0.4.4)
@@ -385,7 +389,6 @@ DEPENDENCIES
   capybara
   carrierwave
   codeclimate-test-reporter
-  coffee-rails
   concurrent-ruby
   concurrent-ruby-ext
   d3-rails (~> 4.0)
@@ -425,7 +428,7 @@ DEPENDENCIES
   sdoc
   selenium-webdriver
   simplecov
-  slim
+  slim-rails
   sorcery
   spring
   thread_safe