feat: fecs support for js/html/css lint and format

`fecs` is a lint tool for HTML/CSS/JavaScript,
see http://fecs.baidu.com for more options.

doc/ale-css.txt

@@ -2,6 +2,14 @@
 ALE CSS Integration                                           *ale-css-options*
 
 
+===============================================================================
+fecs                                                            *ale-css-fecs*
+
+`fecs` options for CSS is the same as the options for JavaScript,
+and both of them reads `./.fecsrc` as the default configuration file.
+See: |ale-javascript-fecs|.
+
+
 ===============================================================================
 prettier                                                     *ale-css-prettier*
 

doc/ale-html.txt

@@ -2,6 +2,14 @@
 ALE HTML Integration                                         *ale-html-options*
 
 
+===============================================================================
+fecs                                                            *ale-html-fecs*
+
+`fecs` options for HTMl is the same as the options for JavaScript,
+and both of them reads `./.fecsrc` as the default configuration file.
+See: |ale-javascript-fecs|.
+
+
 ===============================================================================
 htmlhint                                                    *ale-html-htmlhint*
 

doc/ale-javascript.txt

@@ -73,6 +73,33 @@ g:ale_javascript_eslint_suppress_missing_config
   configuration files are found.
 
 
+===============================================================================
+fecs                                                      *ale-javascript-fecs*
+
+`fecs` is a lint tool for HTML/CSS/JavaScript, can be installed via:
+
+  `$ npm install --save-dev fecs`
+
+And the configuration file is located at `./fecsrc`, see http://fecs.baidu.com
+for more options.
+
+
+g:ale_javascript_fecs_executable             *g:ale_javascript_fecs_executable*
+                                             *b:ale_javascript_fecs_executable*
+  Type: |String|
+  Default: `'fecs'`
+
+  See |ale-integrations-local-executables|
+
+
+g:ale_javascript_fecs_use_global             *g:ale_javascript_fecs_use_global*
+                                             *b:ale_javascript_fecs_use_global*
+  Type: |Number|
+  Default: `get(g:, 'ale_use_global_executables', 0)`
+
+  See |ale-integrations-local-executables|
+
+
 ===============================================================================
 flow                                                      *ale-javascript-flow*
 

doc/ale-supported-languages-and-tools.txt

@@ -187,6 +187,7 @@ Notes:
   * `terraform-fmt`
 * HTML
   * `alex`!!
+  * `fecs`
   * `HTMLHint`
   * `prettier`
   * `proselint`
@@ -205,6 +206,7 @@ Notes:
   * `uncrustify`
 * JavaScript
   * `eslint`
+  * `fecs`
   * `flow`
   * `jscs`
   * `jshint`
@@ -437,6 +439,7 @@ Notes:
   * `thrift`
 * TypeScript
   * `eslint`
+  * `fecs`
   * `prettier`
   * `tslint`
   * `tsserver`

doc/ale.txt

@@ -1893,6 +1893,7 @@ documented in additional help files.
     mcsc..................................|ale-cs-mcsc|
     uncrustify............................|ale-cs-uncrustify|
   css.....................................|ale-css-options|
+    fecs..................................|ale-css-fecs|
     prettier..............................|ale-css-prettier|
     stylelint.............................|ale-css-stylelint|
   cuda....................................|ale-cuda-options|
@@ -1970,6 +1971,7 @@ documented in additional help files.
   hcl.....................................|ale-hcl-options|
     terraform-fmt.........................|ale-hcl-terraform-fmt|
   html....................................|ale-html-options|
+    fecs..................................|ale-html-fecs|
     htmlhint..............................|ale-html-htmlhint|
     tidy..................................|ale-html-tidy|
     prettier..............................|ale-html-prettier|
@@ -1988,6 +1990,7 @@ documented in additional help files.
     uncrustify............................|ale-java-uncrustify|
   javascript..............................|ale-javascript-options|
     eslint................................|ale-javascript-eslint|
+    fecs..................................|ale-javascript-fecs|
     flow..................................|ale-javascript-flow|
     importjs..............................|ale-javascript-importjs|
     jscs..................................|ale-javascript-jscs|