add metatype to ipv4 union with getter/setter
use new getter/setter
Merge pull request #15 from duk3luk3/histogram

Histogram
Merge pull request #16 from duk3luk3/histogram

more formatting
Add accessor for totals to histogram class

numSamples, sum, and avg can now be accessed in a clean way via the
:totals() method. This fixes a problem whereby the fields could be
accessed while they were in dirty state.