Extract color information from pptx files

[mattfidler]

I find it useful to match the color in the powerpoint presentations. This function allows this to work correctly.

[mattfidler]

I also memoized the functions since it may take some time to extract the color information (just FYI)

[davidgohel]

Hi, thanks and sorry for the delay.

I'd like to stop adding things in ReporteRs as it became hard to maintain.

However, colors of theme are available in a new package officer. See color_scheme. From its results, you should be able to use pptxFullColors.

KR,
David