Add linting with eslint in NeoVim, with a few bugs.

plugin/ale/aaflags.vim

@@ -0,0 +1,42 @@
+" This file sets up configuration settings for the ALE plugin.
+" Flags can be set in vimrc files and so on to disable particular features,
+" etc.
+
+if exists('g:loaded_ale_flags')
+    finish
+endif
+
+let g:loaded_ale_flags = 1
+
+" This flag can be set to 0 to disable linting when text is changed.
+if !exists('g:ale_lint_on_text_changed')
+    let g:ale_lint_on_text_changed = 1
+endif
+
+" This flag can be set with a number of milliseconds for delaying the
+" execution of a linter when text is changed. The timeout will be set and
+" cleared each time text is changed, so repeated edits won't trigger the
+" jobs for linting until enough time has passed after editing is done.
+if !exists('g:ale_lint_delay')
+    let g:ale_lint_delay = 100
+endif
+
+" This flag can be set to 0 to disable linting when the buffer is entered.
+if !exists('g:ale_lint_on_enter')
+    let g:ale_lint_on_enter = 1
+endif
+
+" This flag can be set to 0 to disable setting the loclist.
+if !exists('g:ale_set_loclist')
+    let g:ale_set_loclist = 1
+endif
+
+" This flag can be set to 0 to disable setting signs.
+if !exists('g:ale_set_signs')
+    let g:ale_set_signs = 1
+endif
+
+" This flag can be set to 0 to disable echoing when the cursor moves.
+if !exists('g:ale_echo_cursor')
+    let g:ale_echo_cursor = 1
+endif