Update Worksheet.php getStyleByColumnAndRow()

http://phpexcel.codeplex.com/discussions/263626

$objPHPExcel->getActiveSheet()->getStyleByColumnAndRow(1, 2, 5, 2)->applyFromArray($styleArray);

It is very convenient in cycles
Update BaseDrawing.php

Avoid division by zero
Fixes html entities to prevent parsing error of generated documentation.

The html output contained "<style> and </style>" which causes a parse
error on stricter html validators. The solution was to swap < and > for
the equivalent html entities &lt; and &gt; respectivelly.

Signed-off-by: André Tannús <atannus@epungo.com.br>
removed unnecessary break
Merge pull request #346 from gondo/patch-1

removed unnecessary break
GH-347 Using $this in static context in Calculation engine
Merge branch 'develop' of https://github.com/PHPOffice/PHPExcel into develop
GH-343 Error with PCLZip temporary directory
DocBlock updates
Allow value of 0 to be passed into POISSON formula
Bug "Undefined variable: options"

There is a bug for the var `$option`:

    Notice: Undefined variable: options in [...]/vendor/phpoffice/phpexcel/Classes/PHPExcel/Settings.php on line 384

This bug is fixed with `self::$_libXmlLoaderOptions == (LIBXML_DTDLOAD | LIBXML_DTDATTR)` instead of `$options == (LIBXML_DTDLOAD | LIBXML_DTDATTR)`
change sequential validation for orientation dompdf
Prevent autoload clash when previous code has used spl_autoload_register
Merge pull request #368 from TravisPaul/develop

Prevent autoload clash when previous code has used spl_autoload_register
Change the names of variables $plotarea and $dataseriesLabel to $plotArea and $dataSeriesLabel, respectively, to make it camel case compliant
Merge pull request #377 from dmelo/develop

Change the names of two variables on the examples, to make it camel case
Implement empty ODF archive

Work item CP1930, GH-157
Implements basic writing functionality
Add example
Change the getter/setter for zeroHeight to camel case