Merge pull request #7 from hairyhenderson/readme-details

📖 Adding details to README

README.md

@@ -2,6 +2,20 @@
 
 # gomplate
 
+A simple [Go template](https://golang.org/pkg/text/template/)-based alternative to [`envsubst`](https://www.gnu.org/software/gettext/manual/html_node/envsubst-Invocation.html).
+
+I really like `envsubst` for use as a super-minimalist template processor. But its simplicity is also its biggest flaw: it's all-or-nothing with shell-like variables.
+
+Gomplate is an alternative that will let you process templates which also include shell-like variables.
+
+## Usage
+
+At the moment, `gomplate` just replaces environment variables. All environment variables are available by referencing `.Env` in the template.
+
+The template is read from standard in, and written to standard out.
+
+Use it like this:
+
 ```console
 $ echo "Hello, {{.Env.USER}}" | gomplate
 Hello, hairyhenderson