Improvement: add an error code when the renderer(blender) is not found on the server side

protocol.txt

@@ -85,6 +85,7 @@ where X:
     * 201 => The client does not have rendering right.
     * 202 => Client's session is dead. Client should do a config request before requesting a new job.
     * 203 => Client's session have been disabled (usually because the client is sending broken frame). The client warms the end user and logout.
+    * 205 => No renderer is available for Client's hardware (pair of OS and architecture). For example Blender is not avaible for MacOS 32bits.
     * something else => unknown error
     
 Answer with no error:

src/com/sheepit/client/Error.java

@@ -26,6 +26,7 @@ public class Error {
 		AUTHENTICATION_FAILED,
 		TOO_OLD_CLIENT,
 		SESSION_DISABLED,
+		RENDERER_NOT_AVAILABLE,
 		MISSING_RENDER,
 		MISSING_SCENE,
 		NOOUTPUTFILE,
@@ -55,6 +56,7 @@ public class Error {
 		JOB_REQUEST_ERROR_DEAD_SESSION(202),
 		JOB_REQUEST_ERROR_SESSION_DISABLED(203),
 		JOB_REQUEST_ERROR_INTERNAL_ERROR(204),
+		JOB_REQUEST_ERROR_RENDERER_NOT_AVAILABLE(205),
 		
 		JOB_VALIDATION_ERROR_MISSING_PARAMETER(300),
 		JOB_VALIDATION_ERROR_BROKEN_MACHINE(301), // in GPU the generated frame is black
@@ -108,6 +110,9 @@ public class Error {
 			case JOB_VALIDATION_ERROR_SESSION_DISABLED:
 				return Type.SESSION_DISABLED;
 				
+			case JOB_REQUEST_ERROR_RENDERER_NOT_AVAILABLE:
+				return Type.RENDERER_NOT_AVAILABLE;
+			
 			default:
 				return Type.UNKNOWN;
 		}
@@ -129,6 +134,8 @@ public class Error {
 			    return "The renderer stopped because either you asked to stop or the server did (usually for a render time too high).";
 			case SESSION_DISABLED:
 				return "The server has disabled your session. Your client may have generated a broken frame (GPU not compatible, not enough RAM/VRAM, etc).";
+			case RENDERER_NOT_AVAILABLE:
+				return "No renderer are available on the server for your machine.";
 			case OS_NOT_SUPPORTED:
 				return "Operating System not supported.";
 			case CPU_NOT_SUPPORTED: