Update gitignore
Update gitignore

ericmeyer/ObjectiveCSlim,paulstringer/ObjectiveCSlim,ericmeyer/ObjectiveCSlim,paulstringer/ObjectiveCSlim,ericmeyer/ObjectiveCSlim,paulstringer/ObjectiveCSlim,paulstringer/ObjectiveCSlim,paulstringer/ObjectiveCSlim,ericmeyer/ObjectiveCSlim,ericmeyer/ObjectiveCSlim