Add readme.

README.md

+# Development Utils
+
+## Colored logger
+
+#### What?
+Bunch of patches for python logging:
+  - add colors
+  - change `stderr` stream (default everywhere) to `stdout`
+
+#### Why?
+Because you don't want to see everything in red in your IDE
+
+#### How?
+Add the following piece of code:
+  - in django - to your `settings/dev.py` (or wherever your dev settings are)
+  - in other projects - anywhere where it will be executed somewhat early (like top of the file)
+
+```
+try:  # Colored logger CaaS. Auto downloaded and verified.
+    import os
+    import hashlib
+    from urllib import request
+    cache, url = "/tmp/_colored_logger.py", "https://lab.it.hs-hannover.de/lukyanch/pydevutils/raw/140726c2cb35dd5f770c4bde86fee3f5d61348b6/colored_logger.py"
+    code = bool(os.path.exists(cache) or request.urlretrieve(url, cache)) and open(cache, "r").read()
+    assert hashlib.sha256(code.encode()).hexdigest() == "d4d261a40f95733f9fb184fc4ccb55d007b880cb62c8d6a06824d43eeb1391ac", "unrecognized content in" + cache
+    exec(code)
+except Exception as e:
+    print("No colored logger: {e.__class__.__name__}: {e}".format(e=e))
+```
+
+# Safe?
+Quite safe. The downloaded file is only executed if its SHA256 matches the expected value.
+
+