Dont set flay default minimum score.

Allow flay to use its own default threshold of 16.
Merge pull request #110 from robincurry/feature/flay-minimum-score

Dont set flay default minimum score.
Update History for #109
Bump to 4.3.1
Add 4.3.1 checksum
Fix formatter configuration.
Clean up spec with side effect.
Remove unneeded cleanup from run specs.
Rename reconfigure -> configure_metrics.

I *think* this is semantically better because it better
hints at what is yielded and how/when to use.
Rename metric_name -> name.
fixup! Rename reconfigure -> configure_metrics.
Allow run options to be configured as attrs.
Rename add_formatter -> configure_formatter.

Semantic consistency ftw.
Move configure_metrics for consistency.
Update documentation for configuration.
Merge branch 'master' into reorganize-method-flow

Conflicts:
	lib/metric_fu/metrics/flay/init.rb
	spec/metric_fu/configuration_spec.rb
Fix typo.
Fix typo in .metrics
Move fileutils require to files that use it
Remove no longer necessary run_rcov/skip_rcov