F/private protected changes

:warning: Rebased on this PR: https://github.com/loadsys/loadsys_codesniffer/pull/10 :warning: 
Closes #6
Closes #5

Private and Protected Properties and Methods now no longer suggest underscores. Also updates the ignored rulesets in the CakePHP core codesniffer to update for this change.
A lot of these "test" variable names are funny now, since the names no longer imply the rule they are following. `$this->underscored` isn't actually underscored, for example. Does it make sense to update the names to reflect our preferences? `$this->privateShouldNotBeDoubleUnderscored` or something?