Implement proper editor integration for mypy

session.vim

@@ -1,6 +1,7 @@
 " Scan the following dirs recursively for tags
 let g:project_tags_dirs = ['kitty', 'kittens']
-let g:syntastic_python_checkers = ['pylama']
+let g:syntastic_python_checkers = ['mypy', 'flake8']
+let g:syntastic_python_mypy_exec = './mypy-editor-integration'
 let g:ycm_python_binary_path = 'python3'
 set wildignore+==template.py
 set wildignore+=tags