* 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
* Merge branch 'master' of C:\Projects\PHPOffice\PHPSpreadsheet\develop with conflicts.
* More trend function unit tests
* Yet more trend function unit tests
* Merge branch 'master' of C:\Projects\PHPOffice\PHPSpreadsheet\develop with conflicts.
* More statistical tests
* Further statistical tests
* Unit tests for some of the trend functions
* resolve scrutiniser objections
* Fix order of @return types :-(
* Merge branch 'master' of C:\Projects\PHPOffice\PHPSpreadsheet\develop with conflicts.
* Additional unit tests for average functions, and fix to AVERAGEIF() function if third argument is passed
* Update change log
* Stricter typed comparisons in AVERAGEIF() conditions
* Unit tests for BETADIST() and BETAINV()