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Documentation and change log updates
Update counters docs
Update timers docs
Update gauges docs
Demonstrate explicit registry argument in the first example
Update meters docs
Update histogram docs
Refer to 2.0.0 in README now that we have the docs updated
Link to Metrics doco site
add missing Metric import
Merge pull request #28 from miner/master

add missing Metric import
Update installation instructions
fix for Timer mean (not rate)
Merge pull request #30 from miner/master

fix for Timer mean (not rate)
Fixed instrument function, which now takes an argument of the metrics registry
Increment version number to 2.1.1
Revert version number change
Merged in master