Added badges and modifies usage

README.md

@@ -1,12 +1,21 @@
 go-iap
 ======
 
-go-iap verifies the purchase receipt via AppStore or GooglePlayStore
+[![Build Status](https://travis-ci.org/dogenzaka/go-iap.svg?branch=master)](https://travis-ci.org/dogenzaka/go-iap)
+[![codecov.io](https://codecov.io/github/dogenzaka/go-iap/coverage.svg?branch=master)](https://codecov.io/github/dogenzaka/go-iap?branch=master)
+
+go-iap verifies the purchase receipt via AppStore or GooglePlayStore.
+
+Current API Documents:
+
+* AppStore: [![GoDoc](https://godoc.org/github.com/dogenzaka/go-iap/appstore?status.svg)](https://godoc.org/github.com/dogenzaka/go-iap/appstore)
+* GooglePlay: [![GoDoc](https://godoc.org/github.com/dogenzaka/go-iap/playstore?status.svg)](https://godoc.org/github.com/dogenzaka/go-iap/playstore)
 
 
 # Installation
 ```
-go get github.com/dogenzaka/go-iap
+go get github.com/dogenzaka/go-iap/appstore
+go get github.com/dogenzaka/go-iap/playstore
 ```
 
 
@@ -16,7 +25,7 @@ go get github.com/dogenzaka/go-iap
 
 ```
 import(
-  "github.com/dogenzaka/go-iap/appstore"
+    "github.com/dogenzaka/go-iap/appstore"
 )
 
 func main() {
@@ -28,14 +37,43 @@ func main() {
 }
 ```
 
+### In App Billing (via GooglePlay)
+
+```
+import(
+    "code.google.com/p/goauth2/oauth"
+
+    "github.com/dogenzaka/go-iap/playstore"
+)
+
+func main() {
+    // You need to prepare an authorization code or a refresh token
+    // If you have a refresh token, you can generate an oauth token like this
+    oauth := &oauth.Token{
+		RefreshToken: "your refresh token",
+	}
+
+	client := playstore.New(oauth)
+	resp, err := client.VerifySubscription("package", "subscriptionID", "purchaseToken")
+}
+```
+
+
 # ToDo
-- [x] App Store Client
-- [ ] Google Play Store Client
+- [x] Validator for In App Purchase Receipt (AppStore)
+- [x] Validator for Subscription token (GooglePlay)
+- [ ] Validator for Purchase Product token (GooglePlay)
+- [ ] More Tests
 
 
 # Support
-iOS7 or above
+
+### In App Purchase
+This validator supports the receipt type for iOS7 or above.
+
+### In App Billing
+This validator uses [Version 3 API](http://developer.android.com/google/play/billing/api.html).
 
 
 # License
-Gorv is licensed under the MIT.
+go-iap is licensed under the MIT.