Update im api documentation

Author: alpegon

README.md

@@ -37,23 +37,23 @@ The log4j.properties file of the tests can help you with the logger configuratio
 
 1.4 USAGE
 -----------------
-The tests defined in the class **InfrastructureManagerApiClientTest** show how to use the im-java-api.
+The tests defined in the class **InfrastructureManagerTest** show how to use the im-java-api.
 Also check the following lines to see some examples of use:
 
 ### 1.4.1 Create the API client
 ```
-InfrastructureManagerApiClient imClient = new InfrastructureManagerApiClient("IM_ENDPOINT", "AUTH_FILE_PATH");
+InfrastructureManager im = new InfrastructureManager("IM_ENDPOINT", "AUTH_FILE_PATH");
 ```
-When creating a new client you have to specify a valid IM URL, and an authorization file path with the credentials required for the infrastrcture deployment.
+When creating a new client you have to specify a valid IM URL, and an authorization file path with the credentials required for the infrastructure deployment.
 More information about the authorization file can be found here: [Auth file](http://www.grycap.upv.es/im/doc/client.html#auth-file).
 You can also check the authorization file used for the tests that is available in 'src/test/resources/'.
 
 ### 1.4.2 Create and destroy an infrastructure
 ```
 // Infrastructure creation based on a TOSCA file
-ServiceResponse response = getImApiClient().createInfrastructure(FileIO.readUTF8File(TOSCA_FILE_PATH));
+InfrastructureUri newInfrastructureUri = im.createInfrastructure(readFile(TOSCA_FILE_PATH), BodyContentType.TOSCA);
 ... USE THE INFRASTRUCTURE ...
 // Infrastructure destruction
-imClient.destroyInfrastructure(getInfrastructureId());
+im.destroyInfrastructure(getInfrastructureId());
 ```
-The **ServiceResponse** class returned by the **createInfrastructure** method contains all the information of the web service response. Check the **ServiceResponse** class methods for more information.
+The 'im' client always returns a POJO with the information of the call. If an error occurs, an **ImClientErrorException** is thrown. This exception contains the error message and the error code returned by the server.