Create a Group Topic

[jaylevin]

Create the ability for the user to create a group topic.

• Allow the user to customize the group name and avatar picture.
• Allow the user to specify "discovery" tags for the group, for other users to discover it.
• Peer 2 peer topics and group topics need to be "differentiated" in the Message history/Contacts List View pane by some type of UI styling.

An example of styling a contact in the ContactsListView differently than the peer to peer topics in the same contacts array:

// ContactsListView.vue

<ul v-for="topic in contacts">
    <li class="contact" :class="{'is-group-topic': !topic.p2p>}">
</ul>

....

<style lang="scss">
li.is-group-topic {
    background-color: green;   // Just an example of how to make the group topics separately styled than the rest of the topics in the above iterated "contacts" array.
} 
</style>
``