Fix warning on 32bit.
avalon: if result_wrong >= get_work_count jump out the read loop
Merge pull request #422 from BitSyncom/avalon

avalon: if result_wrong >= get_work_count jump out the read loop
Wrap result wrong tests in avalon scanhash in unlikely() and only consider a hash count of zero wrong if a restart wasn't issued.
Merge branch 'master' into avalon-dev
Add more faqs to README.
Yet more README faqs.