Upgrade to Rails 5.0

Gemfile

@@ -1,21 +1,21 @@
 source 'https://rubygems.org'
 ruby '2.4.1'
 
-gem 'rails', " ~> 4.2.7"
+gem 'rails', " ~> 5.0.7"
 gem 'russian'
 gem 'static_docs' #, path: "/Users/mikdiet/projects/opensource/static_docs"
 
 gem 'pg'
-gem 'textacular', '~> 3.0'
+gem 'textacular'
 
 gem 'nokogiri'
-gem 'sass-rails', '~> 4.0.0'
-gem "less-rails"
+gem 'sass-rails'
+gem "less-rails", '>= 3.0.0'
 gem 'haml-rails'
 gem 'RedCloth'
 gem 'redcarpet'
 gem 'config'
-gem 'twitter-bootstrap-rails'
+gem 'twitter-bootstrap-rails', '~> 2.2.8'
 gem 'jquery-rails'
 
 gem 'capistrano', '~> 2.15'
@@ -27,13 +27,6 @@ gem 'coffee-rails'
 
 gem 'git', require: false
 
-group :development do
-  gem 'quiet_assets'
-  gem 'web-console', '~> 2.0'
-  # Need for cap tasks for 3.2 branch
-  # gem 'thinking-sphinx', require: false
-end
-
 group :development, :test do
   gem "rspec-rails"
   gem 'webrat'
@@ -42,6 +35,6 @@ group :development, :test do
 end
 
 group :test do
-  gem 'factory_girl_rails'
+  gem 'factory_bot_rails'
   gem 'database_cleaner'
 end