Encrypt/Decrypt Messages Throughout Conversations

[torch2424]

closes #27
closes #28
closes #64

However, this opens #72 and #73

This is the final PR to finish up the functionality of the app. This Allows users to Encrypt Messages when creating new conversations, encrypt messages when replying to a conversation, and Decrypt Messages On viewing a conversation. This is all done in observables. Also, this does tweak the backend a bit, it allows the schema for messages to work a bit better with encryption. the routes affected are conversation POST and conversation PUT. Requests and responses are tweaked to match the following schema:

Conversation POST Request Schema

Old

{
	"access_token": "EAAaib9ZAEbpUBAEUNGKjhpSQAp2BW3TJ9BleM73YXaD7YofkJxvEY1iZAzvEv6KzkgDEl565YJ6n1mjpNZBkGXGPCrHAjvZC89TipZAi8QFvfzQmUDh3NjnONIVD1prrwVxzazx1Vg5ZAgoa4GWyFobAT5lEdW9JnUiEYOmx633AZDZD",
	"message": "Hey, I can send a message to the server :^)!!",
	"members": ["5840b911de8fe11352d23869"],
	"messageKey": { 
		"5840b911de8fe11352d23869" : "312bdfjg2Efh241", 
		"5840b926de8fe11352d2386a" : "443j2h4jl13kkfH"
	}
}

New

{
	"access_token": "EAAaib9ZAEbpUBAEUNGKjhpSQAp2BW3TJ9BleM73YXaD7YofkJxvEY1iZAzvEv6KzkgDEl565YJ6n1mjpNZBkGXGPCrHAjvZC89TipZAi8QFvfzQmUDh3NjnONIVD1prrwVxzazx1Vg5ZAgoa4GWyFobAT5lEdW9JnUiEYOmx633AZDZD",
        "members": ["5840b911de8fe11352d23869"],
	"messages": {
            "5840b911de8fe11352d23869":    {
                      "message": "ENCRYPTED_AES_MESSAGE_AND_HMAC_JSON_STRINGYIFIED--jahljASLHDASLHfjasdhfoieur23ouro32jwf...",
                      "messageKey": "ENCRYPTED_AES_KEYS_WITH_PGP---BEGIN PGP MESSAGE---..."
            },
            "5840b926de8fe11352d2386a":    {
                      "message": "ENCRYPTED_AES_MESSAGE_AND_HMAC_JSON_STRINGYIFIED--j2345y65e4woieur23ouro32jwf...",
                     "messageKey": "ENCRYPTED_AES_KEYS_WITH_PGP---BEGIN PGP MESSAGE---..."
            }
        }
}

Conversation PUT Request Schema

Old

{
	"access_token": "EAAaib9ZAEbpUBAHgYpFEUZCxt3knvFqBWZAUV3cJAiDZBCRg8VxD95UNZCfqIFODPESp6EHcgJyXiQyspkZAYlby2XGgvBq2MKC5CdkStbXgZCIBDe7qHin7yu7szB14mSjSseDH0hajF9iBTjRpzrkrWekq3wlHn4ZD",
	"message": "This is a new message!",
	"messageKey": { 
		"5840b911de8fe11352d23869" : "312bdfjg2Efh241", 
		"5840b926de8fe11352d2386a" : "443j2h4jl13kkfH"
	},
	"conversationID" : "5840b911de8fe11352d23869_5840b926de8fe11352d2386a"
}

New

{
	"access_token": "EAAaib9ZAEbpUBAEUNGKjhpSQAp2BW3TJ9BleM73YXaD7YofkJxvEY1iZAzvEv6KzkgDEl565YJ6n1mjpNZBkGXGPCrHAjvZC89TipZAi8QFvfzQmUDh3NjnONIVD1prrwVxzazx1Vg5ZAgoa4GWyFobAT5lEdW9JnUiEYOmx633AZDZD",
        "members": ["5840b911de8fe11352d23869"],
        "conversationID" : "5840b911de8fe11352d23869_5840b926de8fe11352d2386a",
	"messages": {
            "5840b911de8fe11352d23869":    {
                      "message": "ENCRYPTED_AES_MESSAGE_AND_HMAC_JSON_STRINGYIFIED--jahljASLHDASLHfjasdhfoieur23ouro32jwf...",
                      "messageKey": "ENCRYPTED_AES_KEYS_WITH_PGP---BEGIN PGP MESSAGE---..."
            },
            "5840b926de8fe11352d2386a":    {
                      "message": "ENCRYPTED_AES_MESSAGE_AND_HMAC_JSON_STRINGYIFIED--j2345y65e4woieur23ouro32jwf...",
                      "messageKey": "ENCRYPTED_AES_KEYS_WITH_PGP---BEGIN PGP MESSAGE---..."
            }
        }
}

Example Gif of everything working: