Text updates for beta-4 release

Author: jekh

README.md

@@ -2,7 +2,7 @@
 
 BrowserMob Proxy is a simple utility that makes it easy to capture performance data from browsers, typically written using automation toolkits such as Selenium and Watir.
 
-The latest version of BrowserMobProxy is 2.1.0-beta-3. It is the second release that supports the [new BrowserMobProxy interface](#new-browsermobproxy-api), and the second release [powered by LittleProxy](#littleproxy-support). We highly recommend that you use  2.1.0-beta-3 instead of the [previous 2.0.0 release](https://github.com/lightbody/browsermob-proxy/tree/2.0).
+The latest version of BrowserMobProxy is 2.1.0-beta-4. It is the second release that supports the [new BrowserMobProxy interface](#new-browsermobproxy-api), and the second release [powered by LittleProxy](#littleproxy-support). We highly recommend that you use  2.1.0-beta-4 instead of the [previous 2.0.0 release](https://github.com/lightbody/browsermob-proxy/tree/2.0).
 
 To use BrowserMob Proxy in your tests, add the `browsermob-core-littleproxy` dependency to your pom:
 ```xml
@@ -11,7 +11,7 @@ To use BrowserMob Proxy in your tests, add the `browsermob-core-littleproxy` dep
         <!-- To use the legacy, Jetty-based implementation, 
              change the artifactId to browsermob-core -->
         <artifactId>browsermob-core-littleproxy</artifactId>
-        <version>2.1.0-beta-3</version>
+        <version>2.1.0-beta-4</version>
         <scope>test</scope>
     </dependency>
 ```
@@ -62,7 +62,7 @@ BrowserMob Proxy now supports using LittleProxy instead of Jetty 5 + Apache HTTP
     <dependency>
         <groupId>net.lightbody.bmp</groupId>
         <artifactId>browsermob-core-littleproxy</artifactId>
-        <version>2.1.0-beta-3</version>
+        <version>2.1.0-beta-4</version>
         <scope>test</scope>
     </dependency>
 ```
@@ -218,7 +218,7 @@ If you're using Java and Selenium, the easiest way to get started is to embed th
         <groupId>net.lightbody.bmp</groupId>
         <!-- To use the legacy, Jetty-based implementation, change the artifactId to browsermob-core -->
         <artifactId>browsermob-core-littleproxy</artifactId>
-        <version>2.1.0-beta-3</version>
+        <version>2.1.0-beta-4</version>
         <scope>test</scope>
     </dependency>
 ```
@@ -425,7 +425,7 @@ When you build the latest code from source, you'll have access to the latest sna
     <dependency>
         <groupId>net.lightbody.bmp</groupId>
         <artifactId>browsermob-core-littleproxy</artifactId>
-        <version>2.1.0-beta-4-SNAPSHOT</version>
+        <version>2.1.0-beta-5-SNAPSHOT</version>
         <scope>test</scope>
     </dependency>
 ```

browsermob-core/src/main/java/net/lightbody/bmp/proxy/ProxyServer.java

@@ -68,7 +68,7 @@
  */
 @Deprecated
 public class ProxyServer implements LegacyProxyServer, BrowserMobProxy {
-    private static final HarNameVersion CREATOR = new HarNameVersion("BrowserMob Proxy", "2.1.0-beta-3-legacy");
+    private static final HarNameVersion CREATOR = new HarNameVersion("BrowserMob Proxy", "2.1.0-beta-4-legacy");
     private static final Logger LOG = LoggerFactory.getLogger(ProxyServer.class);
 
     /**