Type Hinting Fixes - Part 1 (#827)

* better linting, by creating a proper .editorconfig & pylintrc
* major drop of linting errors, from 786 errors to 145
* using Py3.6 `__init_subclass__` allows to remove the use of `abc` and `@register_architecture`
* using `__init_subclass__` to create base class for commands
* using `__init_subclass__` to create base class for functions

.editorconfig

@@ -0,0 +1,21 @@
+# https://github.com/editorconfig/editorconfig/wiki/EditorConfig-Properties
+
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.py]
+indent_style = space
+indent_size = 4
+
+[Makefile]
+indent_style = tab
+
+[*.yml]
+indent_style = space
+indent_size = 2