Improve README

* fix code blocks
* fix highlighting
* fix require statements

Author: pvorb

README.md

@@ -10,42 +10,41 @@ Usage
 - All api methods are available through subdb.api attributes (see http://thesubdb.com/api/ for methods and arguments).
 - A hash method helper is also available
 
-```nodejs
+``` javascript
 subdb.computeHash(path_to_movie, callback);
 ```
-
-```js
 For searching a sub file
 
-	SubDb = require("subdb");
+``` javascript
+var SubDb = require("subdb");
 
-	var subdb = new SubDb();
-	subdb.computeHash(path_to_movie, function(err, res) {
-		if(err) return err;
+var subdb = new SubDb();
+subdb.computeHash(path_to_movie, function(err, res) {
+	if(err) return err;
 
-		var hash = res;
-		subdb.api.search_subtitles(hash, function(err, res){
+	var hash = res;
+	subdb.api.search_subtitles(hash, function(err, res){
 
-			if(err) return err;
-
-			subdb.api.download_subtitle(hash, res.join(','), 'pathtosub.srt', function(err, res) {
-				if(err) return err;
+		if(err) return err;
 
-				// sub is normally fetched into pathtosub.srt
-			});
+		subdb.api.download_subtitle(hash, res.join(','), 'pathtosub.srt', function(err, res) {
+			if(err) return err;
 
+			// sub is normally fetched into pathtosub.srt
 		});
+
 	});
+});
 ```
 For uploading a sub file
 
-```javascript
-	SubDb = require("subdb");
+``` javascript
+var SubDb = require("subdb");
 
-	var subdb = new SubDb();
-	subdb.api.upload_subtitle(hash, subfile, function(err, res){
-		if(err) return err;
+var subdb = new SubDb();
+subdb.api.upload_subtitle(hash, subfile, function(err, res){
+	if(err) return err;
 
-		// sub subfile is normally uploaded to thesubdb.com servers
-	});
+	// sub subfile is normally uploaded to thesubdb.com servers
+});
 ```