Deleted all 'text substitution' code for sketch saving.

sketch.sourceCode = sketch.sourceCode.replace('&','&amp;')
sketch.sourceCode = sketch.sourceCode.replace('<','&lt;')
sketch.sourceCode = sketch.sourceCode.replace(' ','&nbsp;')
sketch.sourceCode = sketch.sourceCode.replace('\r\n','<br>')
sketch.sourceCode = sketch.sourceCode.replace('\n','<br>')
sketch.sourceCode = sketch.sourceCode.replace('\r','<br>')
sketch.sourceCode = sketch.sourceCode.replace('\t','&nbsp;&nbsp;&nbsp;&nbsp;')
sketch.sourceCode = sketch.sourceCode.replace('"','&quot;')
sketch.sourceCode = sketch.sourceCode.replace("'", '&#39;')