Fixes grammar errors in clothing items

I already made a pull for this, but GitHub fought tooth and nail to prevent me from doing it right, so here's a re-upload. Copied from the previous PR:

I have always been tired of grammar errors like missing punctuation or improper capitalization in items, so I decided to do something about it.

In short:
1. Grammar errors in all articles of clothing have been corrected (i.e. greatcoat lacking punctuation)
2. Descriptions have been edited or added for some pieces of clothing (i.e. science goggles and grey jumpsuit)

I will be making more PRs in the future to fix errors in other items.
Lings are definitely agents for hire and there's nothing indicating there's some sort of ling organization but I've never heard any lore suggesting wizards are involved with the Syndicate. The ninja.dm file also seems to support that the Wizard Federation is a distinct entity from the Syndicate.