Improved docs & refactored errors

Signed-off-by: Vishal Rana <vr@labstack.com>

context.go

@@ -43,7 +43,7 @@ func (c *Context) Bind(v interface{}) error {
 // response with status code.
 func (c *Context) Render(code int, name string, data interface{}) error {
 	if c.echo.renderer == nil {
-		return ErrNoRenderer
+		return RendererNotRegistered
 	}
 	c.Response.Header().Set(HeaderContentType, MIMEHTML+"; charset=utf-8")
 	c.Response.WriteHeader(code)

echo.go

@@ -81,8 +81,8 @@ var (
 	}
 
 	// Errors
-	ErrUnsupportedMediaType = errors.New("echo: unsupported media type")
-	ErrNoRenderer           = errors.New("echo: renderer not registered")
+	UnsupportedMediaType  = errors.New("echo: unsupported media type")
+	RendererNotRegistered = errors.New("echo: renderer not registered")
 )
 
 // New creates an Echo instance.
@@ -119,7 +119,7 @@ func New() (e *Echo) {
 		} else if strings.HasPrefix(ct, MIMEForm) {
 			return nil
 		}
-		return ErrUnsupportedMediaType
+		return UnsupportedMediaType
 	})
 
 	return

website/docs/index.md

@@ -1,4 +1,11 @@
-# Echo [![GoDoc](http://img.shields.io/badge/go-documentation-blue.svg?style=flat-square)](http://godoc.org/github.com/labstack/echo) [![Build Status](http://img.shields.io/travis/labstack/echo.svg?style=flat-square)](https://travis-ci.org/labstack/echo) [![Coverage Status](http://img.shields.io/coveralls/labstack/echo.svg?style=flat-square)](https://coveralls.io/r/labstack/echo)
+# Echo
+
+Simple and performant web development!
+
+---
+
+## Overview
+
 Echo is a fast HTTP router (zero memory allocation) and micro web framework in Go.
 
 ## Features
@@ -151,6 +158,12 @@ func main() {
 }
 ```
 
+## Contribute
+- Find bugs
+- Suggest new features
+- Improve documentation
+- Participate in discussion
+
 ## License
 
 [MIT](https://github.com/labstack/echo/blob/master/LICENSE)