hll benchmark
remove HLL version specific code outside of HyperLogLogCollector
no need for volatile references

we make no guarantees wrt threadsafety in this class
minor hll optimizations
check should be safe to move out of loop
make it clear mergeAndStoreByteRegister has no side effects
clean up + header
fix config manager
remove database specific code from ConfigManager
more consistent placeholder references
mark long-running tests as @Ignore + docs
one more final variable for good measure
folding into direct buffers is faster
benchmark more closely matches actual implementation
add url logging to DirectDruidClient for debugging purposes
add changes as suggested by cheddar
make isPostgreSQL check URI instead of metadata
use prepared statement instead of string interpolation
path should already be a proper uri

works around issues when config cannot properly initialize early
in the indexing process
Merge pull request #448 from metamx/hdfs-config-fix

path should already be a proper uri