Tenative plan for where to put data managers (issue #22)

Note git doesn't allow you to check in an empty directory,
which is why you can't see the proposed data_managers
folder yet.

README.rst

@@ -93,9 +93,12 @@ Folder Structure
 ================
 
 Within the ``tools`` folder is one folder for each Tool or Tool Suite released
-on the Galaxy Tool Shed. Similarly, ``dependencies`` contains packages for
-Galaxy Tool Shed dependency definitions, and ``datatypes`` contains packages
-for Galaxy Tool Shed datatype definitions.
+on the Galaxy Tool Shed (these child folder names match the Tool Shed names).
+
+Similarly, ``dependencies`` contains packages for Galaxy Tool Shed dependency
+definitions, ``datatypes`` contains packages for Galaxy Tool Shed datatype
+definitions, and ``data_managers`` contains Galaxy Data Managers for tasks
+like setting up local copies of NCBI BLAST databases.
 
 Additionally there is a shared ``test-data`` folder used for functional test
 sample data, and a shared ``tool-data`` folder used for configuration files.