support for -ve counters including test coverage of re-written processCounters()
fixes #19
tidied up with `go fmt`
add test and distribution scripts
"fix" some command argument help text

flush-intervals, received, percent-threshold is percentile
Merge pull request #44 from ploxiln/arg_help_spelling

"fix" some command argument help text
Merge pull request #42 from jehiah/test_dist_scripts_42

release scripts
Merge pull request #41 from JamesCohen-awin/negative-counters

support for -ve counters
improve handling of malformed data
fixes #45
Merge pull request #46 from JamesCohen-awin/issue-45

improve handling of malformed data