Removed syntastic and replaced it with ale

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

sources_non_forked/ale/doc/ale-cs.txt

@@ -0,0 +1,102 @@
+===============================================================================
+ALE C# Integration                                             *ale-cs-options*
+
+
+===============================================================================
+mcs                                                                *ale-cs-mcs*
+
+  The `mcs` linter looks only for syntax errors while you type. See |ale-cs-mcsc|
+  for the separately configured linter for checking for semantic errors.
+
+
+g:ale_cs_mcs_options                                     *g:ale_cs_mcs_options*
+                                                         *b:ale_cs_mcs_options*
+
+  Type: String
+  Default: `''`
+
+  This variable can be changed to pass additional flags given to mcs.
+
+  NOTE: The -unsafe flag is selected implicitly and thus does not need to be
+  explicitly included in the |g:ale_cs_mcs_options| or |b:ale_cs_mcs_options|
+  parameter.
+
+
+===============================================================================
+mcsc                                                              *ale-cs-mcsc*
+
+  The mcsc linter checks for semantic errors when files are opened or saved
+  See |ale-lint-file-linters| for more information on linters which do not
+  check for problems while you type.
+
+  The mcsc linter uses the mono mcs compiler to generate a temporary module
+  target file (-t:module). The module includes including all '*.cs' files
+  contained in the directory tree rooted at the path defined by the
+  |g:ale_cs_mcsc_source| or |b:ale_cs_mcsc_source| variable.
+  variable and all sub directories.
+
+  The paths to search for additional assembly files can be specified using the
+  |g:ale_cs_mcsc_assembly_path| or |b:ale_cs_mcsc_assembly_path| variables.
+
+  NOTE: ALE will not find any errors in files apart from syntax errors if any
+  one of the source files contains a syntax error. Syntax errors must be fixed
+  first before other errors will be shown.
+
+
+g:ale_cs_mcsc_options                                   *g:ale_cs_mcsc_options*
+                                                        *b:ale_cs_mcsc_options*
+  Type: |String|
+  Default: `''`
+
+  This option can be set to pass additional arguments to the `mcs` compiler.
+
+  For example, to add the dotnet package which is not added per default: >
+
+      let g:ale_cs_mcs_options = '-pkg:dotnet'
+<
+  NOTE: the `-unsafe` option is always passed to `mcs`.
+
+
+g:ale_cs_mcsc_source                                     *g:ale_cs_mcsc_source*
+                                                         *b:ale_cs_mcsc_source*
+  Type: |String|
+  Default: `''`
+
+  This variable defines the root path of the directory tree searched for the
+  '*.cs' files to be linted. If this option is empty, the source file's
+  directory will be used.
+
+  NOTE: Currently it is not possible to specify sub directories and
+  directory sub trees which shall not be searched for *.cs files.
+
+
+g:ale_cs_mcsc_assembly_path                       *g:ale_cs_mcsc_assembly_path*
+                                                  *b:ale_cs_mcsc_assembly_path*
+  Type: |List|
+  Default: `[]`
+
+  This variable defines a list of path strings to be searched for external
+  assembly files. The list is passed to the mcs compiler using the `-lib:`
+  flag.
+
+
+g:ale_cs_mcsc_assemblies                             *g:ale_cs_mcsc_assemblies*
+                                                     *b:ale_cs_mcsc_assemblies*
+  Type: |List|
+  Default: `[]`
+
+  This variable defines a list of external assembly (*.dll) files required
+  by the mono mcs compiler to generate a valid module target. The list is
+  passed the mcs compiler using the `-r:` flag.
+
+  For example: >
+
+    " Compile C# programs with the Unity engine DLL file on Mac.
+    let g:ale_cs_mcsc_assemblies = [
+    \ '/Applications/Unity/Unity.app/Contents/Frameworks/Managed/UnityEngine.dll',
+    \ 'path-to-unityproject/obj/Debug',
+    \]
+<
+
+===============================================================================
+  vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl: