Merge pull request #106 from jasoncapehart/master

Variance block
error check for json marshalling
no fatal error in NSQ, allow for lazy re-connect
add non-thrashing code to sync
ensure single request for post_value
added group histogram
Merge pull request #109 from mikedewar/master

added group histogram
this doesn't work anymore
single client POST
fixing #104
fixes for #107
merge
merge
fixing #110
Merge pull request #108 from nikhan/daemon

many small bug fixes