move unix timestamp/iso8601 conversion into reusable functions
move unix timestamp/iso8601 conversion into reusable functions

Dieterbe/anthracite,square-root/anthracite,jjardel/anthracite,nickman/anthracite,jjardel/anthracite,square-root/anthracite,Dieterbe/anthracite,nickman/anthracite,Dieterbe/anthracite,nickman/anthracite,Dieterbe/anthracite,jjardel/anthracite,jjardel/anthracite,nickman/anthracite,square-root/anthracite,square-root/anthracite