First version, this produces a correct file but has a problem, the styles are not applied to the sheet
Include required version of PHP to 5.4
Now styles are correctly presented
include pattern gray125
color must be uppercase
always send b, i, strike and u to the stylesheet
allow set styles properties from constructor
code cleaning
make total number of cols and rows optional
include compatibility initial styles
corrected wrong font color attribute
include constant for full date
include timestamp converter for dates to excel dates
support for date time write
support for date time write
rewrite structure of basic types
code cleaning
include format general as first format
Test for the full generation of the file
code cleaning