move to model, add defaults

Author: Jessica Shi

codegen.html

@@ -132,7 +132,7 @@ <h6 style="margin-bottom: 0px; margin-top: 18px">Input a tensor algebra expressi
           <div class="mdl-grid" style="padding-top: 6px">
             <div class="mdl-layout-spacer"></div>
             <div class="mdl-cell mdl-cell--9-col">
-              <button id="btnSchedule" class="mdl-button mdl-js-button mdl-button--raised   mdl-js-ripple-effect demo-btn" style="margin-bottom:10px; width: 30%">
+              <button id="btnSchedule" class="mdl-button mdl-js-button mdl-button--raised mdl-js-ripple-effect demo-btn" style="margin-bottom:10px; width: 30%">
                 Add Scheduling Command
               </button>
               <table class="mdl-data-table mdl-js-data-table" style="width: 100%;