(#34) Implement note rule CPMR0061 - Id Contains "."

[AdmiringWorm]

Description Of Changes

This implements the note rule CPMR0061 that verifies whether a package
uses a dot in its identifier, which is not recommended to do unless
absolutely necessary.

This implementation is more comprehensive than what is implemented in
package validator, where package validator will have false negatives
that this implementation will properly flag.

Motivation and Context

We want to implement as many rules as we can that is currently handled by package validator.

Testing

THis is mostly covered by unit tests, but can be manually verified by

1. Create a new package with a . in its identifier.
2. Attempt to run choco pack on the created nuspec file.
3. Verify the rule CPMR0061 is shown.
4. Rename the identifier to end with .install, but keep the other . in its identifier.
5. Attempt to run choco pack on the nuspec file again.
6. Verify the rule CPMR0061 is shown.
7. Rename the identifier again to remove the extra . in the identifier, but keep .install.
8. Attempt to run choco pack on the nuspec file.
9. Verify the rule CPMR0061 is no longer displayed.

Operating Systems Testing

• Windows 10

Change Types Made

• Bug fix (non-breaking change).
• Feature / Enhancement (non-breaking change).
• Breaking change (fix or feature that could cause existing functionality to change).
• Documentation changes.
• PowerShell code changes.

Change Checklist

• Requires a change to the documentation.
• Documentation has been updated (no documentation needed to be updated).
• Tests to cover my changes, have been added.
• All new and existing tests passed?
• PowerShell code changes: PowerShell v2 compatibility checked?

Related Issue

Fixes #34

[gep13]

Just one minor change, and a question in a couple places, otherwise this LGTM, and would be happy to get it merged/released.

[gep13]

LGTM!

[gep13]

@AdmiringWorm thanks for getting this added!