Fixes #976 Now uses GitHub to retrieve most current version

Reworked whole Version Checker with an extensible interface to add any other service later on easier.
The version checker now has its own config file, to collect the different options and extract them from the main config file.
In that you can specify how fine the versions should be checked.

src/main/java/appeng/recipes/loader/ConfigLoader.java

@@ -18,6 +18,7 @@
 
 package appeng.recipes.loader;
 
+
 import java.io.BufferedReader;
 import java.io.File;
 import java.io.FileInputStream;
@@ -25,19 +26,21 @@ import java.io.InputStreamReader;
 
 import appeng.api.recipes.IRecipeLoader;
 
-public class ConfigLoader implements IRecipeLoader
+
+public final class ConfigLoader implements IRecipeLoader
 {
+	private final File rootDirectory;
 
-	private final String rootPath;
-
-	public ConfigLoader(String s) {
-		this.rootPath = s;
+	public ConfigLoader( File rootDirectory )
+	{
+		this.rootDirectory = rootDirectory;
 	}
 
 	@Override
-	public BufferedReader getFile(String s) throws Exception
+	public BufferedReader getFile( String s ) throws Exception
 	{
-		File f = new File( this.rootPath + s );
+		final File f = new File( this.rootDirectory, s );
+
 		return new BufferedReader( new InputStreamReader( new FileInputStream( f ), "UTF-8" ) );
 	}
 }