Is there any way open source projects can get increased concurrency (and/or a large ec2 instance)? We'd be happy to pay a premium if necessary. We've just moved from cloudbees, where a single build took 25 minutes using an EC2 high speed instance, now a single build on travis takes one and a half hours, we've split that into several smaller builds, but it's still slow, and when there's multiple jobs to get done, it can still take hours for the most recent job to reach the front of the queue.