Fix broken wiki links on tdwg.org/activities page (table)

[stanblum]

Fix broken wiki links on tdwg.org/activities page (table)

• [ ] GIG
• [ ] IMG
• [ ] LIT (and mailing list)
• [ ] DwC
• [ ] OBS
• [ ] Phylo
• [ ] Process
• [ ] TAG
• [ ] GUID
• [ ] TAPIR
• [ ] TIP <probably should archive this or change to infrastructure FS

Also need to update any references to the wiki that appear on content pages.

[MattBlissett]

This refers to the old site http://old.tdwg.org/activities