[tests failing due to multi-cluster read] start on bulk read implementation
[still failing tests] more progress on bulk reads
fix multiple calls of callbacks
fix math for trailerSector
fix destination buffer for group read
simplify logic
handle off-end-of-chain reads like main function does
use setImmediate instead of process.nextTick
pass along EOF signal to chain.readFromPosition callers
steps towards moving cache into chains for better control
fix up time handling bugs revealed by longer-persitent shared entry cache
better directory attr value, ensures tests pass even if entry is cached
more progress on cache, main thing now is to share chains for dirents AFAICT
cacheabunga dudes!
delay release of info underlying fd for half a second after close, in case an upcoming call reopens
remove old file-finding code, now replaced by chain-cache-savvy fs._sharedEntryForSteps
remove dev logging
workararound for https://github.com/tessel/beta/issues/455
use bulk writes for chain writing now too
get rid of _parentChain hack by passing _fd.info instead