python: Import improved python bindings.

This commit imports the python bindings from:
    https://github.com/poljar/python-olm

The bindings are imported at commit c44b145818520d69eaaa350fb95afcb846125e0f

Minor modifications were made while importing:
    - Removed travis config
    - Removed Arch Linux PKGBUILD
    - Removed the html docs, they can be rebuild by running make html in
      the docs folder
    - Slightly modified the README

The new bindings feature some improvements over the old ones:
    - Python 2 and 3 support
    - Automatic memory management
    - Automatic memory clearing before it is freed
    - Type signatures via the python typing module
    - Full test coverage
    - Properties are utilized where it makes sense (e.g. account.id)

Signed-off-by: Damir Jelić <poljar@termina.org.uk>

1 files changed, 24 insertions, 0 deletions

diff --git a/python/olm/_compat.py b/python/olm/_compat.py
new file mode 100644
index 0000000..67d312b
--- /dev/null
+++ b/python/olm/_compat.py
@@ -0,0 +1,24 @@
+# -*- coding: utf-8 -*-
+# libolm python bindings
+# Copyright © 2015-2017 OpenMarket Ltd
+# Copyright © 2018 Damir Jelić <poljar@termina.org.uk>
+
+from builtins import bytes, str
+from typing import AnyStr
+
+try:
+    import secrets
+    URANDOM = secrets.token_bytes  # pragma: no cover
+except ImportError:  # pragma: no cover
+    from os import urandom
+    URANDOM = urandom  # type: ignore
+
+
+def to_bytes(string):
+    # type: (AnyStr) -> bytes
+    if isinstance(string, bytes):
+        return string
+    elif isinstance(string, str):
+        return bytes(string, "utf-8")
+
+    raise TypeError("Invalid type {}".format(type(string)))