Fix minor typos and spelling errors

README.md

@@ -30,7 +30,7 @@ $ go get github.com/markbates/goth
 
 ## Examples
 
-See the [examples](examples) folder for a working application that let's users authenticate
+See the [examples](examples) folder for a working application that lets users authenticate
 through Twitter, Facebook or Google Plus.
 
 ## Issues

doc.go

@@ -4,7 +4,7 @@ packages for Go web applications.
 
 This package was inspired by https://github.com/intridea/omniauth.
 
-See the examples folder for a working application that let's users authenticate
+See the examples folder for a working application that lets users authenticate
 through Twitter or Facebook.
 */
 package goth

providers/faux/faux.go

@@ -1,4 +1,4 @@
-// Package faux is used exclusive for testing purposes. I would strongly suggest you move along
+// Package faux is used exclusively for testing purposes. I would strongly suggest you move along
 // as there's nothing to see here.
 package faux
 

session.go

@@ -15,7 +15,7 @@ type Session interface {
 	GetAuthURL() (string, error)
 	// Marshal generates a string representation of the Session for storing between requests.
 	Marshal() string
-	// Authorize should validate the data from the provider and return back an access token
+	// Authorize should validate the data from the provider and return an access token
 	// that can be stored for later access to the provider.
 	Authorize(Provider, Params) (string, error)
 }