Bugfix: Stratum: Wait a bit for a response before assuming the pool is hiding block contents
README: FAQ about Raspberry Pi issues
Merge commit 'f1971de' into bfgminer-3.5.x
Add USB faqs.

Conflicts:
	README
README: Document VCOM low_latency flag and latency_timer sysfs attribute, which can help run more VCOM-based devices on low-end USB hosts