add .DS_Store to .gitignore
add .DS_Store to .gitignore

KciNKh/user-agent-utils,pcollaog/user-agent-utils,nhojpatrick/user-agent-utils,fauxsoup/user-agent-utils,kyle-neal/user-agent-utils,KciNKh/user-agent-utils,HaraldWalker/user-agent-utils,kyle-neal/user-agent-utils,ntent-ad/user-agent-utils,guignol/user-agent-utils,ntent-ad/user-agent-utils,onshape/user-agent-utils