fill in missing wiki sections

[GavinHuttley]

just copy across the content from cogent3 workshop and maybe link directly to resource files from the original

• working with cogent3 env
• putting files in place

[GavinHuttley]

I'll add text describing the download for the installed apes tarball when I've finished that

[khiron]

Content copied across from phylomania workshop.

suggest having a recipe for "here's how you download the apes yourself" in the data directory using the config file in that directory, or here's a zip we prepared earlier that you can wget and unpack directly into your data directory.

[GavinHuttley]

@khiron but there are two sections missing on this page

[GavinHuttley]

turns out the links on that navigation page were not updated, done