Add merge type setting to repository page.

The merge type is a per repository setting. Add it to the edit page.

src/main/java/com/gitblit/wicket/GitBlitWebApp.properties

@@ -659,6 +659,7 @@ gb.nTotalTickets = {0} total
 gb.body = body
 gb.mergeSha = mergeSha
 gb.mergeTo = merge to
+gb.mergeType = merge type
 gb.labels = labels
 gb.reviewers = reviewers
 gb.voters = voters
@@ -670,6 +671,7 @@ gb.repositoryDoesNotAcceptPatchsets = This repository does not accept patchsets.
 gb.serverDoesNotAcceptPatchsets = This server does not accept patchsets.
 gb.ticketIsClosed = This ticket is closed.
 gb.mergeToDescription = default integration branch for merging ticket patchsets
+gb.mergeTypeDescription = merge a ticket fast-forward only, if necessary, or always with a merge commit to the integration branch
 gb.anonymousCanNotPropose = Anonymous users can not propose patchsets.
 gb.youDoNotHaveClonePermission = You are not permitted to clone this repository.
 gb.myTickets = my tickets
@@ -741,4 +743,4 @@ gb.sshKeyCommentDescription = Enter an optional comment. If blank, the comment w
 gb.permission = Permission
 gb.sshKeyPermissionDescription = Specify the access permission for the SSH key
 gb.transportPreference = Transport Preference
-gb.transportPreferenceDescription = Set the transport that you prefer to use for cloning
+gb.transportPreferenceDescription = Set the transport that you prefer to use for cloning

src/main/java/com/gitblit/wicket/pages/EditRepositoryPage.html

@@ -122,7 +122,8 @@
 			<div wicket:id="acceptNewTickets"></div>
 			<div wicket:id="requireApproval"></div>
 			<div wicket:id="mergeTo"></div>
-		
+			<div wicket:id="mergeType"></div>
+
 		</div>
 				
 		<!-- federation -->

src/main/java/com/gitblit/wicket/pages/EditRepositoryPage.java

@@ -56,6 +56,7 @@ import com.gitblit.Constants.AccessRestrictionType;
 import com.gitblit.Constants.AuthorizationControl;
 import com.gitblit.Constants.CommitMessageRenderer;
 import com.gitblit.Constants.FederationStrategy;
+import com.gitblit.Constants.MergeType;
 import com.gitblit.Constants.RegistrantType;
 import com.gitblit.GitBlitException;
 import com.gitblit.Keys;
@@ -458,6 +459,11 @@ public class EditRepositoryPage extends RootSubPage {
 				getString("gb.mergeToDescription"),
 				new PropertyModel<String>(repositoryModel, "mergeTo"),
 				availableBranches));
+		form.add(new ChoiceOption<MergeType>("mergeType",
+				getString("gb.mergeType"),
+				getString("gb.mergeTypeDescription"),
+				new PropertyModel<MergeType>(repositoryModel, "mergeType"),
+				Arrays.asList(MergeType.values())));
 
 		//
 		// RECEIVE