Refactoring for Consistency

[zachcran]

Is this pull request associated with an issue(s)? No.

Description This PR does some miscellaneous refactoring to make the codebase more consistent. Depends on #79 to make sure the documentation is still consistent after that PR's additions.

Note: This PR is only bumping the minor version, even though it contains API-breaking changes (moving assert.cmake), since we are not going to bump to v1.0.0 until the official release.

TODOs

• [x] Make files named the same as their subdirectory (like map/map.cmake) primarily include other files containing public API functions instead of containing the public API code itself.
• [x] Move utilities/assert.cmake to asserts/assert.cmake.
• [x] Ensure that the documentation is consistent after #79.
• [x] Check that CMaize unit tests and integration tests still pass.
• [x] Check that CMakeTest unit tests still pass.

[zachcran]

CMaize unit tests and integration tests passed on my local system with these changes.

[zachcran]

I verified that locally CMaize and CMakeTest still pass their unit tests with these changes.