Removed syntastic and replaced it with ale

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

sources_non_forked/ale/ale_linters/python/pylint.vim

@@ -0,0 +1,63 @@
+" Author: keith <k@keith.so>
+" Description: pylint for python files
+
+let g:ale_python_pylint_executable =
+\   get(g:, 'ale_python_pylint_executable', 'pylint')
+
+let g:ale_python_pylint_options =
+\   get(g:, 'ale_python_pylint_options', '')
+
+let g:ale_python_pylint_use_global = get(g:, 'ale_python_pylint_use_global', 0)
+
+function! ale_linters#python#pylint#GetExecutable(buffer) abort
+    return ale#python#FindExecutable(a:buffer, 'python_pylint', ['pylint'])
+endfunction
+
+function! ale_linters#python#pylint#GetCommand(buffer) abort
+    return ale#Escape(ale_linters#python#pylint#GetExecutable(a:buffer))
+    \   . ' ' . ale#Var(a:buffer, 'python_pylint_options')
+    \   . ' --output-format text --msg-template="{path}:{line}:{column}: {msg_id} ({symbol}) {msg}" --reports n'
+    \   . ' %s'
+endfunction
+
+function! ale_linters#python#pylint#Handle(buffer, lines) abort
+    " Matches patterns like the following:
+    "
+    " test.py:4:4: W0101 (unreachable) Unreachable code
+    let l:pattern = '\v^[^:]+:(\d+):(\d+): ([[:alnum:]]+) \(([^(]*)\) (.*)$'
+    let l:output = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
+        "let l:failed = append(0, l:match)
+        let l:code = l:match[3]
+
+        if (l:code is# 'C0303')
+        \ && !ale#Var(a:buffer, 'warn_about_trailing_whitespace')
+            " Skip warnings for trailing whitespace if the option is off.
+            continue
+        endif
+
+        if l:code is# 'I0011'
+            " Skip 'Locally disabling' message
+             continue
+        endif
+
+        call add(l:output, {
+        \   'lnum': l:match[1] + 0,
+        \   'col': l:match[2] + 1,
+        \   'text': l:match[5],
+        \   'code': l:match[4],
+        \   'type': l:code[:0] is# 'E' ? 'E' : 'W',
+        \})
+    endfor
+
+    return l:output
+endfunction
+
+call ale#linter#Define('python', {
+\   'name': 'pylint',
+\   'executable_callback': 'ale_linters#python#pylint#GetExecutable',
+\   'command_callback': 'ale_linters#python#pylint#GetCommand',
+\   'callback': 'ale_linters#python#pylint#Handle',
+\   'lint_file': 1,
+\})