Update info

Author: dscottraynsford

README.md

@@ -3,6 +3,9 @@
 [![Build status](https://ci.appveyor.com/api/projects/status/b3vo36jocq0tvojw?svg=true)](https://ci.appveyor.com/project/PlagueHO/filecontentdsc)
 [![codecov](https://codecov.io/gh/PlagueHO/FileContentDsc/branch/dev/graph/badge.svg)](https://codecov.io/gh/PlagueHO/FileContentDsc)
 
+This resource module contains resources for setting the content of files.
+Configuration text files are the most common use case for this module.
+
 The **FileContent** module contains the following resources:
 
 - **ReplaceText**: Replaces strings matching a regular expression in a file.