When using -p, the underlying diff-quality command will pass that
number as a value for --fail-under.
For example,
paver run_quality -p 75
Will pass 75 into the --fail-under switch on diff-quality.
Also upgrades diff-cover in order to take advantage of this funcitonality.
This adds the -l switch, wherein a violations limit is passed in. For
example:
paver run_pep8 -l 700
Will fail if more than 700 violations are found.
By default, this limit is not enforced (i.e. if the -l switch
is not passed into the command, then a limit will not be put
into effect for that run)
