Removed syntastic and replaced it with ale

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

sources_non_forked/ale/doc/ale-spec.txt

@@ -0,0 +1,43 @@
+===============================================================================
+ALE Spec Integration                                         *ale-spec-options*
+                                                         *ale-integration-spec*
+
+===============================================================================
+Integration Information
+
+  The rpmlint linter is disabled by default, because running rpmlint can
+  result in the execution of code embedded in the spec file and rpmlint makes
+  no distinction between checks which are safe to run on untrusted files and
+  those which are not.
+
+  Currently linters must be enabled globally.  The rpmlint linter can be
+  enabled with:
+>
+  let g:ale_linters = {'spec': ['rpmlint']}
+<
+
+===============================================================================
+rpmlint                                                      *ale-spec-rpmlint*
+
+g:ale_spec_rpmlint_executable                   *g:ale_spec_rpmlint_executable*
+                                                *b:ale_spec_rpmlint_executable*
+  Type: |String|
+  Default: `'rpmlint'`
+
+  This variable sets executable used for rpmlint.
+
+
+g:ale_spec_rpmlint_options                         *g:ale_spec_rpmlint_options*
+                                                   *b:ale_spec_rpmlint_options*
+  Type: |String|
+  Default: `''`
+
+  Set this to pass extra arguments to rpmlint.
+
+  For example, to instruct rpmlint to use a specific configuration file:
+>
+  let g:ale_spec_rpmlint_options = '-f custom.cf'
+<
+
+===============================================================================
+  vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl: