Add options for list of properties to inspect

[nohwnd]

Consider adding option to Assert-Equivalent that will list the properties to inspect.
Also consider adding -ExcludeProperties, OnlyExpectedProperties or other similar options.

• Exclude full paths
• Exclude wildcarded paths
• Come up with a good name for -OnlyComparePathsOnExpected (-SkipNonMatchingPropertiesActualPaths)?
• Select full paths to inlcude
• Select wildcarded paths to include
• Decide if the Get-EquivalencyOptions cmdlet needs to be external, or if we should put the options directly on Assert-Equivalent
• Write few nice examples
• Consider including the path to the output to make it more obvious where the difference is, even without verbose output (this is probably a big task)