Update README.md

Update to live code-climate badge.
Merge pull request #156 from jhmartin/codeclimatebadge

Update README.md with live code-climate badge
Don’t require a formatter if it’s already been defined.

This allows end users to specify a non-standard formatter in their
config file.
Merge pull request #157 from inferiorhumanorgans/iho

Don’t require a formatter if it’s already been defined.
pin log_switch as the 1.0.0 release of log_switch breaks tailor

This should only be temp, but as of log_switch 1.0.0 LogSwitch::Mixin
no longer exists.
Merge pull request #161 from tempredirect/pin_log_switch

pin log_switch as the 1.0.0 release of log_switch breaks tailor
Use ~> 0.3.0 of log_switch
Fixed most of the specs, updated to rspec 3