Kibit's integration point and public API

Kibit's core functionality uses core.logic to construct idiomatic
replacements/simplifications for patterns of code.

The (leiningen) facing interface for Kibit. Provides helpers for finding files in a project, and
linting a list of files.

Various helpers providing a with-monkeypatches form which wraps

Format and display output generated from check-* functions

`rules.clj` provides the core functionality for extracting
and merging rules from namespaces.  There are shorthands for
the individual rule sets, via the `rule-map`