fix logging for aws tag
Merge pull request #156 from brharrington/issue-88

fix logging for aws tag
Make the test work even on very slow machines
Increase sleep time and use multiples of ten. Allow up to 9ms off in the avg.
Merge pull request #159 from dmuino/fixTest

Make TimedInterfaceTest work even on very slow VMs
have ResettableCounter return a rate per second, Counter now allows any subclass of Number as the value type
add test case for resettable counter
Merge pull request #160 from brharrington/issue-144

Issue 144
add polling interval estimate to avoid overweighting with dynamically created counters