Add an option for ignoring the output of TSLint if a file contains a single blank line

doc/ale-typescript.txt

@@ -30,6 +30,18 @@ g:ale_typescript_tslint_config_path       *g:ale_typescript_tslint_config_path*
   such path exists, this variable will be used instead.
 
 
+g:ale_typescript_tslint_ignore_empty_files
+                                   *g:ale_typescript_tslint_ignore_empty_files*
+                                   *b:ale_typescript_tslint_ignore_empty_files*
+  Type: |Number|
+  Default: `0`
+
+  When set to `1`, ALE will not report any problems for empty files with
+  TSLint. ALE will still execute TSLint for the files, but ignore any problems
+  reported. This stops ALE from complaining about newly created files,
+  and files where lines have been added and then removed.
+
+
 g:ale_typescript_tslint_rules_dir           *g:ale_typescript_tslint_rules_dir*
                                             *b:ale_typescript_tslint_rules_dir*
   Type: |String|