use objectForKey
_BIDFilterReservedClaims() API
update
remove bid_dhparams.c
use objectForKey
xcode
remove more xcode stuff that shouldn't be checked in
more xcode gitignore tweaks
remove more xcode cruft
more xcode gitignore tweaks

Conflicts:
	BrowserID.xcodeproj/.gitignore
update gitignore
Merge branch 'browserid' into browserid-sad

Conflicts:
	BrowserID.xcodeproj/project.xcworkspace/xcuserdata/lukeh.xcuserdatad/UserInterfaceState.xcuserstate