Change it so it doesn't always build against debug binaries.  This way, it'll automatically point at release/debug webrtc builds based on the xcode build setting.
make sure we create a release build every time so that when we point to a release build it will resolve.
Merge pull request #3 from pristineio/auto-release-build

Allow xcode to automatically select debug or release build
speed hacks to improve downloading of packages will be released soon to help mitigate the build time