* Merge branch 'master' of C:\Projects\PHPOffice\PHPSpreadsheet\develop with conflicts.
* Separate out date/time tests into individual tests
* Need to update the version of phpunit at some point to deal with the new assertions and deprecated assertions
* Appease the CS Gods
* More refactoring of Date/Time tests
* Replace self assertions with instance assertions (looking forward to upgrading phpunit)
* Finish refactoring of date/time tests as individual tests
* Test for DateTimeInterface rather than for DateTime
* A few strict comparisons
* Fix to test names
* Merge branch 'master' of C:\Projects\PHPOffice\PHPSpreadsheet\develop with conflicts.
* Adjusted logic for COUNT() function to handle differences in EXCEL, GNUMERIC and OPENOFFICE modes for cells and for literal values
* Fix case-sensitivity in filenames
* Appeasing Codesniffer
* Resolve COUNTA() differences between cell values and literals
* Style fixes
* Start refactoring statistical function tests into individual tests rather than having a single, giant test for all statistical functions.... first step toward doing this for all tests
* More refactoring into separate tests
If all functions have their own individual test files, it should be a lot easier to identify which functions aren't covered by tests yet
* Missing last lines in files
Adrien Crivelli