Use glance as a backend for Solum LanguagePack API (PUT Method)

a PUT request will update all the attibutes of the languagePack
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Change-Id: Ie92aafaf637c2aad92b562a02828e48098411e23
typos and layout of docs

Change-Id: I706e81f9cea08bf46e57f5b174a977eb3f9a7e81
Merge "typos and layout of docs"
Merge "Use glance as a backend for Solum LanguagePack API (PUT Method)"