Better intro line for Emit Structure section in README

Author: viranch

README.md

@@ -109,9 +109,9 @@ If no `<dest>` file is specified, the output is sent to stdout.  Mainly useful f
 
 The templates used by docker-gen are written using the Go [text/template](http://golang.org/pkg/text/template/) language. In addition to the [built-in functions](http://golang.org/pkg/text/template/#hdr-Functions) supplied by Go, docker-gen provides a number of additional functions to make it simpler (or possible) to generate your desired output.
 
-#### Docker Gen Emit Structure
+#### Emit Structure
 
-The emitted structure consists of the following Go structs:
+Within the templates, the object emitted by docker-gen will be a structure consisting of following Go structs:
 
 ```go
 type RuntimeContainer struct {