Improved accuracy of statuses

- "NOT_STARTED" is now "DOWNLOADED"
- "DOWNLOADING" is now "MISSING_DATA"
- Removed "DOWNLOAD_FAILED"

Some of these could be reintroduced once the system is able to support them.

src/main/java/org/qortal/api/model/ArbitraryResourceSummary.java

@@ -7,12 +7,10 @@ import javax.xml.bind.annotation.XmlAccessorType;
 public class ArbitraryResourceSummary {
 
 	public enum ArbitraryResourceStatus {
-		NOT_STARTED,
-		DOWNLOADING,
 		DOWNLOADED,
 		BUILDING,
 		READY,
-		DOWNLOAD_FAILED,
+		MISSING_DATA,
 		BUILD_FAILED,
 		UNSUPPORTED,
 		BLACKLISTED

src/main/java/org/qortal/arbitrary/ArbitraryDataResource.java

@@ -63,7 +63,7 @@ public class ArbitraryDataResource {
             builder.process();
 
         } catch (MissingDataException e) {
-            return new ArbitraryResourceSummary(ArbitraryResourceStatus.DOWNLOADING);
+            return new ArbitraryResourceSummary(ArbitraryResourceStatus.MISSING_DATA);
 
         } catch (IOException | DataException e) {
             // Ignore for now
@@ -71,6 +71,6 @@ public class ArbitraryDataResource {
 
         // FUTURE: support DOWNLOADED state once the build queue system has been upgraded
 
-        return new ArbitraryResourceSummary(ArbitraryResourceStatus.NOT_STARTED);
+        return new ArbitraryResourceSummary(ArbitraryResourceStatus.DOWNLOADED);
     }
 }