Update README files to fix names of packages. (#204)

Author: bklimt

packages/database/README.md

@@ -1,6 +1,6 @@
 # `@firebase/database`
 
-This is the realtime database component for the Firebase JS SDK. It has a peer 
+This is the realtime database component for the Firebase JS SDK. It has a peer
 dependency on the [`@firebase/app`](https://npm.im) package on NPM. This package
 is included by default in the [`firebase`](https://npm.im/firebase) wrapper
 package.
@@ -24,7 +24,7 @@ below:
 import firebase from '@firebase/app';
 import '@firebase/database'
 
-// Do stuff w/ `firebase` and `firebase.auth`
+// Do stuff w/ `firebase` and `firebase.database`
 ```
 
 **CommonJS Modules**
@@ -33,7 +33,7 @@ import '@firebase/database'
 const firebase = require('@firebase/app').default;
 require('@firebase/database');
 
-// Do stuff with `firebase` and `firebase.auth`
+// Do stuff with `firebase` and `firebase.database`
 ```
 
 ## Documentation

packages/firestore/README.md

@@ -1,6 +1,6 @@
 # `@firebase/firestore`
 
-This is the realtime database component for the Firebase JS SDK. It has a peer 
+This is the Firestore component for the Firebase JS SDK. It has a peer
 dependency on the [`@firebase/app`](https://npm.im) package on NPM. This package
 **is not** included by default in the [`firebase`](https://npm.im/firebase)
 wrapper package.
@@ -24,7 +24,7 @@ below:
 import firebase from '@firebase/app';
 import '@firebase/firestore'
 
-// Do stuff w/ `firebase` and `firebase.auth`
+// Do stuff w/ `firebase` and `firebase.firestore`
 ```
 
 **CommonJS Modules**
@@ -33,7 +33,7 @@ import '@firebase/firestore'
 const firebase = require('@firebase/app').default;
 require('@firebase/firestore');
 
-// Do stuff with `firebase` and `firebase.auth`
+// Do stuff with `firebase` and `firebase.firestore`
 ```
 
 ## Documentation

packages/messaging/README.md

@@ -1,6 +1,6 @@
 # `@firebase/messaging`
 
-This is the authentication component for the Firebase JS SDK. It has a peer 
+This is the messaging component for the Firebase JS SDK. It has a peer
 dependency on the [`@firebase/app`](https://npm.im) package on NPM. This package
 is included by default in the [`firebase`](https://npm.im/firebase) wrapper
 package.
@@ -24,7 +24,7 @@ below:
 import firebase from '@firebase/app';
 import '@firebase/messaging'
 
-// Do stuff w/ `firebase` and `firebase.auth`
+// Do stuff w/ `firebase` and `firebase.messaging`
 ```
 
 **CommonJS Modules**
@@ -33,7 +33,7 @@ import '@firebase/messaging'
 const firebase = require('@firebase/app').default;
 require('@firebase/messaging');
 
-// Do stuff with `firebase` and `firebase.auth`
+// Do stuff with `firebase` and `firebase.messaging`
 ```
 
 ## Documentation

packages/storage/README.md

@@ -1,6 +1,6 @@
 # `@firebase/storage`
 
-This is the authentication component for the Firebase JS SDK. It has a peer 
+This is the storage component for the Firebase JS SDK. It has a peer
 dependency on the [`@firebase/app`](https://npm.im) package on NPM. This package
 is included by default in the [`firebase`](https://npm.im/firebase) wrapper
 package.
@@ -24,7 +24,7 @@ below:
 import firebase from '@firebase/app';
 import '@firebase/storage'
 
-// Do stuff w/ `firebase` and `firebase.auth`
+// Do stuff w/ `firebase` and `firebase.storage`
 ```
 
 **CommonJS Modules**
@@ -33,7 +33,7 @@ import '@firebase/storage'
 const firebase = require('@firebase/app').default;
 require('@firebase/storage');
 
-// Do stuff with `firebase` and `firebase.auth`
+// Do stuff with `firebase` and `firebase.storage`
 ```
 
 ## Documentation