Grammar errors fixed in clothing

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.

P.S. The commit history probably looks ugly because at one point I screwed up the branches. I'm still learning GitHub, please don't reject me.