fixed fatal error (using $this in static method)
fixed number format
fixed $xfIndex for Excel5 error handling
fix space
Update Excel2007 writer to use getDiskCachingDirectory().

The Excel2007 writer was using the system's temp directory, which fails on systems where it is inaccessible.
Merge branch 'develop' of https://github.com/PHPOffice/PHPExcel into develop

Conflicts:
	Classes/PHPExcel/Calculation.php
Fixed undefined variable error due to $styleArray being used before it's initialised

http://phpexcel.codeplex.com/workitem/16208
Test for cell ref before numeric value

Fix for formulae that reference a sheet whose name begins with a digit; these were erroneously identified as numeric values, causing the '!' to throw an undefined variable error.
Add locateName() and getFromName() to PHPExcel_Shared_ZipArchive, Modify PHPExcel_Reader_Excel2007 to use zipClass from PHPExcel_Settings::getZipClass()
BugFix : input var for locateName()
Update ZipArchive.php
Update OOCalc.php

Fix bug reading OO files
Update OOCalc.php

Bug fix reading Open Office calcs
Merge branch 'develop' of https://github.com/PHPOffice/PHPExcel into develop
https://github.com/PHPOffice/PHPExcel/issues/265

PHPExcel_Shared_String.IsUTF8 returns FALSE for Cyrillic UTF-8 input
Merge pull request #1 from RomanSyroeshko/PHPExcel#265

https://github.com/PHPOffice/PHPExcel/issues/265
Double quote support for SUMIF()

SUMIF() should handle double quotes properly in both criteria and
cells values. This is especially useful when we need to compare string
containing themselve double quote(s).
Travis: test also against PHP 5.5
Fixed problem in Excel 2007 reader with headers and footers containing multiple images. All images were substituted with the first one.
Implement Excel 5 RC4 stream decryption

The decryption functions and objects implemented here are are
based on the source of Spreadsheet-ParseExcel:
http://search.cpan.org/~jmcnamara/Spreadsheet-ParseExcel/