Improve docs and fix example typos

Improve documentation (fix typos, improve explanations...) and fix typos in examples.

Author: sveljko

README.md

@@ -50,7 +50,7 @@ and [Subscribe](examples/PubNubSubscriber)!
         PubSubClient *sclient = PubNub.subscribe(subchannel);
         if (!sclient) return; // error
         String msg;
-        SubscribeMessageCracker ritz(sclient);
+        SubscribeCracker ritz(sclient);
         while (!ritz.finished()) {
             ritz.get(msg);
             if (msg.length() > 0) {

examples/PubNubDemo/PubNubDemo.ino

@@ -102,7 +102,7 @@ void loop()
         return;
     }
     String                  msg;
-    SubscribeMessageCracker ritz(sclient);
+    SubscribeCracker ritz(sclient);
     while (!ritz.finished()) {
         ritz.get(msg);
         if (msg.length() > 0) {
@@ -120,7 +120,7 @@ void loop()
         delay(1000);
         return;
     }
-    SubscribeMessageCracker tuc(hisclient);
+    SubscribeCracker tuc(hisclient);
     while (!tuc.finished()) {
         tuc.get(msg);
         if (msg.length() > 0) {

examples/PubNubSubscriber/PubNubSubscriber.ino

@@ -83,8 +83,8 @@ void loop()
         return;
     }
 
-    String                  msg;
-    SubscribeMessageCracker ritz(client);
+    String           msg;
+    SubscribeCracker ritz(client);
     while (!ritz.finished()) {
         ritz.get(msg);
         if (msg.length() > 0) {

library.properties

@@ -1,5 +1,5 @@
 name=Pubnub
-version=3.0.0
+version=3.0.1
 author=Vladimir Veljkovic <[email protected]>
 maintainer=Vladimir Veljkovic <[email protected]>
 sentence=Pubnub SDK for Arduino.