* Test on Windows.

* Add a fixer for the 'indent_style' rule.

* Add a non-standard rule to ignore directories.

* Optimize speed and memory usage.

* Document how to install.

* The file pattern `{num1..num2}` is not fully implemented yet. See
`ConvertWildcardPatternToGoRegexp` in `path_matcher.go`

* Add an example of how to use the `check` command in a continuous integration build or in a Git
pre-commit hook.