Add Smart Home device group management

[Apollon77]

Retrieve Groups:
in phoenix reply parallel to first amazonBridgeDetails:

"applianceGroups": {
                    "applianceGroups": {
                        "amzn1.HomeAutomation.ApplianceGroup.XXXXXX.550a4bf5-4852-4a35-81c4-b3568b222033": {
                            "applianceGroupName": "Lichter Küche",
                            "applianceGroupIdentifier": {
                                "value": "amzn1.HomeAutomation.ApplianceGroup.XXXXX.550a4bf5-4852-4a35-81c4-b3568b222033"
                            },
                            "spaceTypes": [],
                            "children": [],
                            "alexaEndpoints": [],
                            "defaults": []
                        }
                    }
                }

Create group:

POST https://alexa.amazon.de/api/phoenix/group
applianceIds	[…]
    0	SKILL_eyJza2lsbElkIjoiYW16bjEuYXNrLXXXXXXEtNDhhOS1iYzBhLWQzZDNiZGU4YjVmYyIsInN0YWdlIjoibGl2ZSJ9_Licht_K_che
    1	SKILL_eyJza2lsbElkIjoiYW16bjEXXXXXXZjEtNDhhOS1iYzBhLWQzZDNiZGU4YjVmYyIsInN0YWdlIjoibGl2ZSJ9_Deckenlicht_K_che
groupId	null
name	Lichter Küche
--> keine

Read a group:

GET https://alexa.amazon.de/api/phoenix/group?_=1532329020882
{"applianceGroups":[{"applianceIds":["SKILL_eyJza2lsbElkIjoiYWXXXXXXXNDhhOS1iYzBhLWQzZDNiZGU4YjVmYyIsInN0YWdlIjoibGl2ZSJ9_Licht_K_che","SKILL_eyJza2lsbElkIjoiYW16XXXXXXZjEtNDhhOS1iYzBhLWQzZDNiZGU4YjVmYyIsInN0YWdlIjoibGl2ZSJ9_Deckenlicht_K_che"],"defaults":[],"groupId":"amzn1.HomeAutomation.ApplianceGroup.YYYYYYYYYY.6e1ee4e0-d152-4ca4-8755-3e826c99dcab","name":"Lichter Küche"}]}

Change a group:

PUT https://alexa.amazon.de/api/phoenix/group/amzn1.HomeAutomation.ApplianceGroup.YYYYYYYYYY.6e1ee4e0-d152-4ca4-8755-3e826c99dcab
applianceIds	[…]
    0	SKILL_eyJza2lsbElkIjoiYW16bjEuYXNrLnNraWxXXXXXXS1iYzBhLWQzZDNiZGU4YjVmYyIsInN0YWdlIjoibGl2ZSJ9_Licht_K_che
    1	SKILL_eyJza2lsbElkIjoiYW16bjEuYXNrLnNraWXXXXXX1iYzBhLWQzZDNiZGU4YjVmYyIsInN0YWdlIjoibGl2ZSJ9_Deckenlicht_K_che
defaults	[]
groupId	amzn1.HomeAutomation.ApplianceGroup.YYYYYYYYYY.6e1ee4e0-d152-4ca4-8755-3e826c99dcab
name	Lichter Küche