cmake-format v0.6.3

This release finally includes some progress on a long-standing goal: a cmake-linter built on the same foundation as the formatter. As of this release The cmake-format python package now comes with both the cmake-format and cmake-lint programs. The linter is still in a relatively early state and lacks many features, but should continue to grow with the formatter in future releases.

Along with the new linter, this release also includes some reorganization of the documentation in order to more clearly separate information about the different programs that are distributed from this repository.