Removed syntastic and replaced it with ale

Read more here:
https://github.com/w0rp/ale

sources_non_forked/ale/doc/ale-ruby.txt

@@ -0,0 +1,102 @@
+===============================================================================
+ALE Ruby Integration                                         *ale-ruby-options*
+
+
+===============================================================================
+brakeman                                                    *ale-ruby-brakeman*
+
+g:ale_ruby_brakeman_options                       *g:ale_ruby_brakeman_options*
+                                                  *b:ale_ruby_brakeman_options*
+  Type: |String|
+  Default: `''`
+
+  The contents of this variable will be passed through to brakeman.
+
+
+===============================================================================
+rails_best_practices                            *ale-ruby-rails_best_practices*
+
+g:ale_ruby_rails_best_practices_executable
+                                   *g:ale_ruby_rails_best_practices_executable*
+                                   *b:ale_ruby_rails_best_practices_executable*
+  Type: String
+  Default: 'rails_best_practices'
+
+  Override the invoked rails_best_practices binary. Set this to `'bundle'` to
+  invoke `'bundle` `exec` `rails_best_practices'`.
+
+g:ale_ruby_rails_best_practices_options
+                                      *g:ale_ruby_rails_best_practices_options*
+                                      *b:ale_ruby_rails_best_practices_options*
+  Type: |String|
+  Default: `''`
+
+  The contents of this variable will be passed through to rails_best_practices.
+
+
+===============================================================================
+reek                                                            *ale-ruby-reek*
+
+g:ale_ruby_reek_show_context                     *g:ale_ruby_reek_show_context*
+                                                 *b:ale_ruby_reek_show_context*
+  Type: |Number|
+  Default: 0
+
+  Controls whether context is included in the linter message. Defaults to off
+  because context is usually obvious while viewing a file.
+
+
+g:ale_ruby_reek_show_wiki_link                 *g:ale_ruby_reek_show_wiki_link*
+                                               *b:ale_ruby_reek_show_wiki_link*
+  Type: |Number|
+  Default: 0
+
+  Controls whether linter messages contain a link to an explanatory wiki page
+  for the type of code smell. Defaults to off to improve readability.
+
+
+===============================================================================
+rubocop                                                      *ale-ruby-rubocop*
+
+g:ale_ruby_rubocop_executable                   *g:ale_ruby_rubocop_executable*
+                                                *b:ale_ruby_rubocop_executable*
+  Type: String
+  Default: `'rubocop'`
+
+  Override the invoked rubocop binary. This is useful for running rubocop
+  from binstubs or a bundle.
+
+
+g:ale_ruby_rubocop_options                         *g:ale_ruby_rubocop_options*
+                                                   *b:ale_ruby_rubocop_options*
+  Type: |String|
+  Default: `''`
+
+  This variable can be change to modify flags given to rubocop.
+
+
+===============================================================================
+ruby                                                            *ale-ruby-ruby*
+
+g:ale_ruby_ruby_executable                         *g:ale_ruby_ruby_executable*
+                                                   *b:ale_ruby_ruby_executable*
+  Type: String
+  Default: `'ruby'`
+
+  This variable can be changed to use a different executable for ruby.
+
+
+===============================================================================
+rufo                                                            *ale-ruby-rufo*
+
+g:ale_ruby_rufo_executable                         *g:ale_ruby_rufo_executable*
+                                                   *b:ale_ruby_rufo_executable*
+  Type: String
+  Default: `'rufo'`
+
+  Override the invoked rufo binary. This is useful for running rufo from
+  binstubs or a bundle.
+
+
+===============================================================================
+  vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl: