This include cases were artificial constraints were not checked
(eg: between -512 and 511 for `DECBIN`) and some bugs were 32
bits platform were assumed.
The following are covered:
`BIN2DEC`, `BIN2HEX`, `BIN2OCT`,
`DEC2BIN`, `DEC2HEX`, `DEC2OCT`,
`HEX2BIN`, `HEX2DEC`, `HEX2OCT`,
`OCT2BIN`, `OCT2DEC`, `OCT2HEX`
Expected data were re-written by using LibreOffice 5 as a reference.
We kept only 8 decimals, because this is the precision used in tests,
and it's easier to read without scientific notation.
Also a few expected values were wrong so they were changed. The correct
expected values were confirmed by both LibreOffice 5 and wolframalpha.com.
Finally fixed an actual bug in code were a NaN value were returned instead of
the correct `#NUM!`.
Deprecated the getCalculatedValue(), setCalculatedValue(), setFormulaAttributes() and getFormulaAttributes() methods in PHPExcel_Cell.
Documentation changes and unit tests.