message: Updated demo master
diff: <p></p>
  <div style="margin-left:10px">
  <code>pptx.defineSlideMaster({</code>
  - <code> title: 'CORP_MASTER',</code>
  - <code> bkgd: 'F1F1F1',</code>
  + <code> title : 'MASTER_SLIDE',</code>
  + <code> margin: [0.5, 0.25, 1.25, 0.25],</code>
  + <code> bkgd : 'EEEEEE',</code>
  <code> objects: [</code>
  - <code> {rect: { x:0, y:0, w:'100%', h:0.5, fill:'0088CC' }},</code>
  + <code> {rect: { x:0, y:6.9, w:'100%', h:0.6, fill:'003b75' }},</code>
  <code> {text: { text:'S.T.A.R. Laboratories', options:{x:0.17, y:0.1, color:'FFFFFF'} }}</code>
  - <code> ]</code>
  + <code> ],</code>
  + <code> slideNumber: { x:1.0, y:7.0, color:'FFFFFF' }</code>
  <code>});</code>
  </div>
  </fieldset>
  