Added "Issues" dashboard

This shows issues assigned to you, across all your projects, in one
place.

References #173

app/controllers/user_issues_controller.rb

@@ -0,0 +1,25 @@
+class UserIssuesController < ApplicationController
+  before_filter :authenticate_user!
+
+  layout "user"
+
+  respond_to :js, :html
+
+  def index
+    @user   = current_user
+    @issues = current_user.assigned_issues.opened
+
+    @issues = @issues.includes(:author, :project)
+
+    respond_to do |format|
+      format.html
+      format.js
+      format.atom { render :layout => false }
+    end
+  end
+
+  def search
+
+  end
+
+end