Switch to using batch fetch method in AstyanaxReader for batch queries
Get rid of collection for a single future
Fix latch size
Fix intermittent test failure
Fix comment
update counter rollups to contain number of samples
add sample count for timer rollups
add a hasData method to Rollup interfact
casing
add comments
clean up metadata reading
move all methods that talk to db to one area. straight cut+paste
clean up get last string metric value
remove references to metadataserializer serializing non-string values
Revert "stop using a sentinel, just use null"

This reverts commit d4176b3197d7776cfbd0606f5765970111cca4a7.
Merge pull request #197 from fourk/cleanup_reader

Cleanup reader pt1
Remove accidental newline

remove newline
Merge pull request #194 from fourk/range_query_support

Update rollups to contain SampleCount
Merge pull request #193 from lakshmi-kannan/bf_http_batch_fetch

HTTP batch fetch API handler changes
Fix intermitted test failure