Rename Tests folder as Examples folder
Fix to X-Axis labels when writing chart DataSeriesValues.php
Addition of an example for creating a radar chart
Minor bugfix to calculation engine formula validation (unbalanced braces)
Bugfix: Work item 18794 - CSV files without a file extension being identified as HTML
Change use of is_a() to use instanceof

While is_a() is no longer deprecated, there are bound to be some people using PHP versions that still have it marked as deprecated.
This is the only occurrence of is_a in the whole of PHPExcel; everywhere else it's using instanceof, so I figured it would be sensible to make it consistent.
Merge pull request #60 from Synchro/develop

Change use of is_a() to use instanceof
Documentation references to /Tests modified to reference /Examples instead
Merge branch 'develop' of https://github.com/PHPOffice/PHPExcel into develop
Fix to cellExists for non-existent namedRanges

Found an issue where cellExists was failing on a non-existent namedRange
as it was flowing down to the coordinateFromString (1217) call.  Proposed
change trusts the REGEXP check and if $namedRange == NULL after all
then simply return false (ie the cell does not exist).
Fix to axis rendering for donut and pie charts
Refactoring of style classes to use an abstract supervisor
Merge branch 'develop' of https://github.com/PHPOffice/PHPExcel into develop
Upload missing style supervisor
Improved AdvancedValueBinder for currency.
Bugfix: Work item GH-66 - Wrong check for maximum number of rows in Excel5 Writer
Fixed formula/formatting bug when removing rows
Ensure that signature of bindParent() in style class overrides matches the signature of bindParent() in the supervisor
Minor charting fixes
Merge pull request #69 from kea/AVB_currency

Improved AdvancedValueBinder for currency
Merge pull request #70 from techhead/fix_insertNewBefore

Fixed formula/formatting bug when removing rows