Added a -r flag to git-flow-feature-pull to support pull with rebase

git-flow-feature

@@ -50,7 +50,7 @@ usage() {
 	echo "       git flow feature diff [<name|nameprefix>]"
 	echo "       git flow feature rebase [-i] [<name|nameprefix>]"
 	echo "       git flow feature checkout [<name|nameprefix>]"
-	echo "       git flow feature pull <remote> [<name>]"
+	echo "       git flow feature pull [-r] <remote> [<name>]"
 }
 
 cmd_default() {
@@ -475,6 +475,7 @@ avoid_accidental_cross_branch_action() {
 
 cmd_pull() {
 	#DEFINE_string prefix false 'alternative remote feature branch name prefix' p
+    DEFINE_boolean rebase false "pull with rebase" r
 	parse_remote_name "$@"
 
 	if [ -z "$REMOTE" ]; then
@@ -500,7 +501,15 @@ cmd_pull() {
 
 		# we already have a local branch called like this, so simply pull the
 		# remote changes in
+        if flag rebase; then
+		    if ! git pull --rebase -q "$REMOTE" "$BRANCH"; then
+			    warn "Pull was aborted. There might be conflicts during rebase or '$REMOTE' might be inaccessible."
+			    exit 1
+		    fi
+        else
            git pull -q "$REMOTE" "$BRANCH" || die "Failed to pull from remote '$REMOTE'."
+	    fi
+
 		echo "Pulled $REMOTE's changes into $BRANCH."
 	else
 		# setup the local branch clone for the first time