Optionally omit stats_counts metrics

Adds the 'flush_counts' config. Defaults to true, so existing configs
aren't affected.
    add config (deleteIdleStats) to delete idle sets, gauges, timers - and a overall flag to set them all but allow individual overrides
    update delete_counters unit test to test deleteIdleStats which covers all stat types
update readme and example for deleteIdleStats and friends
reorder example for easier merge
reorder example for easier merge
Initial Doc Split starting point
Fix link layout slightly
Update graphite doc for common pitfalls
Merge pull request #266 from aw/ipv6_compat

Add configuration option to listen on an IPv6 address
Merge pull request #265 from eladroz/doc_graphite

Update graphite doc for common pitfalls
Updating for clean merge
Merge pull request #262 from etsy/doc_re-org

Doc re-org
Fixed link to supported backends
Merge pull request #267 from pmark/patch-1

Fixed link to supported backends
Testing 0.10
Merge pull request #268 from etsy/10

Testing 0.10 passed, lets start testing it regularly.
update pr/232 to be merge-able
Adding Scala Example
Merge pull request #270 from joshgarnett/master

Scala Example Added
Merge pull request #269 from etsy/keen99-p/deleteidlestats

update to pull/232 Keen99 p/deleteidlestats