Added better docstrings to subpackages and cleaned out some places which were unclear.

evennia/utils/__init__.py

@@ -1,3 +1,9 @@
+"""
+This sub-package holds the miscelaneous utilities used by other
+modules in Evennia. It also holds the idmapper in-memory caching
+functionality.
+
+"""
 # simple check to determine if we are currently running under pypy.
 try:
     import __pypy__ as is_pypy