Better XML parsing in NvHTTP

Cleans up some unnecessary code in `NvHTTP` and DRY's it up a bit.
Adds in a `getAppList` function which returns a list of `NvApp`, a class
used to represent applications. This is then used by `getSteamAppId` so
it actually opens up Steam instead of whatever the first app is.

src/com/limelight/nvstream/NvApp.java

@@ -0,0 +1,31 @@
+package com.limelight.nvstream;
+
+public class NvApp {
+	private String appName;
+	private int appId;
+	private boolean isRunning;
+	
+	public void setAppName(String appName) {
+		this.appName = appName;
+	}
+	
+	public void setAppId(String appId) {
+		this.appId = Integer.parseInt(appId);
+	}
+	
+	public void setIsRunning(String isRunning) {
+		this.isRunning = isRunning.equals("1");
+	}
+	
+	public String getAppName() {
+		return this.appName;
+	}
+	
+	public int getAppId() {
+		return this.appId;
+	}
+	
+	public boolean getIsRunning() {
+		return this.isRunning;
+	}
+}