Added .DS_Store to .gitignore
Added .DS_Store to .gitignore

I use a mac and .DS_Store is auto generated in each folder, this will
allow me to not upload a .DS_Store file for each folder.

CityOfLearning/ForgeEssentials,ForgeEssentials/ForgeEssentialsMain,aschmois/ForgeEssentialsMain,Techjar/ForgeEssentials,planetguy32/ForgeEssentials,liachmodded/ForgeEssentials