Relax eqeqeq null check (fixes #669)

When the "smart" option is enabled, eqeqeq will now allow double-
equals comparisons to null to check for null or undefined in a
single expression.
Merge pull request #713 from btmills/eqeqeq-null

Relax eqeqeq null check (fixes #669)
Add reset cli flag (refs #692)

Adds a --reset (-r) flag to the cli options that resets all
default rules to be off.