Add ktlint fixer support.

doc/ale-kotlin.txt

@@ -84,9 +84,17 @@ g:ale_kotlin_ktlint_rulesets                     *g:ale_kotlin_ktlint_rulesets*
   This list should contain paths to ruleset jars and/or strings of maven
   artifact triples. Example:
   >
-  let g:ale_kotlin_ktlint_rulesets = ['/path/to/custom-rulset.jar',
+  let g:ale_kotlin_ktlint_rulesets = ['/path/to/custom-ruleset.jar',
   'com.ktlint.rulesets:mycustomrule:1.0.0']
 
+g:ale_kotlin_ktlint_options                       *g:ale_kotlin_ktlint_options*
+  Type: |String|
+  Default: `''`
+
+  Additional options to pass to ktlint for both linting and fixing. Example:
+  >
+  let g:ale_kotlin_ktlint_options = '--android'
+
 
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 languageserver                                      *ale-kotlin-languageserver*