XLSX: font export according to MS-OI29500: Microsoft Office Implementation Information for ISO/IEC-29500 Standard Compliance
XLSX: font color save:  Opaque color: Alpha = 255
 rgb (Alpha Red Green Blue Color Value)  - from OfficeXML
XLSX Export: styles: off by one
Merge branch 'master' of https://github.com/the-Arioch/avemey.com