Merge pull request #27 from janeklb/update-26-public-addFilter

Updates StatementClient's addFilter method to have public visibility …

README.md

@@ -192,6 +192,12 @@ filterByRegistration
 filterBySince
 filterByUntil
 ```
+
+In addition to these preset filters, you can add non-standard filters to the statements query by using `addFilter`. For example:
+```java
+client.addFilter('context.extensions.yourExtension', 'customExtensionValue').getStatements();
+```
+
 These filters can be chained together to created more complex queries, such as
 
 ```java

src/main/java/gov/adlnet/xapi/client/StatementClient.java

@@ -192,7 +192,7 @@ public Statement getVoided(String statementId) throws java.io.IOException {
 		return this.getDecoder().fromJson(result, Statement.class);
 	}
 
-	private StatementClient addFilter(String key, String value) {
+	public StatementClient addFilter(String key, String value) {
 		try {
 			StatementClient client = new StatementClient(this._host,
 					this.username, this.password);