Removed syntastic and replaced it with ale

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

sources_non_forked/ale/ale_linters/coffee/coffee.vim

@@ -0,0 +1,23 @@
+" Author: KabbAmine - https://github.com/KabbAmine
+" Description: Coffee for checking coffee files
+
+function! ale_linters#coffee#coffee#GetExecutable(buffer) abort
+    return ale#path#ResolveLocalPath(
+    \   a:buffer,
+    \   'node_modules/.bin/coffee',
+    \   'coffee'
+    \)
+endfunction
+
+function! ale_linters#coffee#coffee#GetCommand(buffer) abort
+    return ale_linters#coffee#coffee#GetExecutable(a:buffer)
+    \   . ' -cp -s'
+endfunction
+
+call ale#linter#Define('coffee', {
+\   'name': 'coffee',
+\   'executable_callback': 'ale_linters#coffee#coffee#GetExecutable',
+\   'command_callback': 'ale_linters#coffee#coffee#GetCommand',
+\   'output_stream': 'stderr',
+\   'callback': 'ale#handlers#gcc#HandleGCCFormat',
+\})