Removed Racket 6.0 from Travis

Author: Simon Johnston

.travis.yml

@@ -20,7 +20,6 @@ env:
     # Supply more than one RACKET_VERSION (as in the example below) to
     # create a Travis-CI build matrix to test against multiple Racket
     # versions.
-    - RACKET_VERSION=6.0
     - RACKET_VERSION=6.5
     - RACKET_VERSION=6.11
     - RACKET_VERSION=HEAD

README.md

@@ -7,16 +7,25 @@
 [![GitHub stars](https://img.shields.io/github/stars/johnstonskj/rml-core.svg)](https://github.com/johnstonskj/rml-core/stargazers)
 ![MIT License](https://img.shields.io/badge/license-MIT-118811.svg)
 
-This package does not assume anything about the capabilities, and uses an
-expansive notion of machine learning that should cover statistical inferencing,
-tree and decision matrix models, as well as deep leaning approaches.
+This Package is part of an expected set of packages implementing machine learning capabilities
+for Racket. The core of this package is the management of *datasets*, these data sets are assumed
+to be for training and testing of machine learning capabilities. This package does not assume
+anything about such capabilities, and uses an expansive notion of machine learning that should
+cover statistical inferencing, tree and decision matrix models, as well as deep leaning approaches.
+
+This module deals with two opaque structure types, `data-set` and `data-set-field`. These are not
+available to clients directly although certain accessors are exported by this module.
+Conceptually a `data-set` is a table of data, columns represent fields that are either *features*
+that represent properties of an instance, and *classifiers* or *labels* that are used to train
+and match instances.
 
 ## Modules
 
 * `data` - TBD
 
 ## Example
 
+TBD
 
 ## Links