Merge pull request #39 from febus982/docs_update

Docs update

Author: febus982

docs/index.md

@@ -34,7 +34,8 @@ however this might be necessary until version `1.0` is released.
 
 [//]: # (https://github.com/mkenney/software-guides/blob/master/STABILITY-BADGES.md)
 * [![stability-beta](https://img.shields.io/badge/stability-beta-33bbff.svg)](https://github.com/mkenney/software-guides/blob/master/STABILITY-BADGES.md#beta) **SQLAlchemy manager:** Implementation is mostly finalised, needs testing in production.
-* [![stability-beta](https://img.shields.io/badge/stability-beta-33bbff.svg)](https://github.com/mkenney/software-guides/blob/master/STABILITY-BADGES.md#beta) **Repository / Unit of work:** Implementation is mostly finalised, needs testing in production.
+* [![stability-beta](https://img.shields.io/badge/stability-beta-33bbff.svg)](https://github.com/mkenney/software-guides/blob/master/STABILITY-BADGES.md#beta) **Repository:** Implementation is mostly finalised, needs testing in production.
+* [![stability-experimental](https://img.shields.io/badge/stability-experimental-orange.svg)](https://github.com/mkenney/software-guides/blob/master/STABILITY-BADGES.md#experimental) **Unit of work:** The implementation is working but limited to repositories using the same engine. Distributed transactions across different engines are not yet supported.
 
 ## Installation
 

docs/manager/session.md

@@ -11,7 +11,7 @@ with sa_manager.get_session() as session:
     session.commit()
 
 # We can also get the `session_class` property of the bind,
-# but t
+# but this is not recommended.
 with sa_manager.get_bind().session_class()() as session:
     session.add(o)
     session.commit()