Subsite support

[jpope19]

dependencies:

• Subsite Support amphora-auth#26

adds subsite support. allows for the following file structure inside of sites:

sites
    - site-name
        - subsites
            - subsite-name
                - media
                index.js
                bootstrap.yaml
                config.yaml
    index.js
    bootstrap.yaml
    config.yaml

required config for subsites:

• protocol
• path
• host
• port
• assetPath

[coveralls]

Pull Request Test Coverage Report for Build 2392

• 130 of 130 (100.0%) changed or added relevant lines in 7 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 2374:	0.0%
Covered Lines:	4145
Relevant Lines:	4145

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💛 - Coveralls

[manuelurenah]

🏄

[reubenson]

needs to return par if sub is not an array for whatever reason?

[jpope19]

Should be ok as is, tested with String params during dev

https://lodash.com/docs/4.17.15#mergeWith

If customizer returns undefined, merging is handled by the method instead. The customizer is invoked with six arguments:
(objValue, srcValue, key, object, source, stack).

Note: This method mutates object.