Add contacts via libfolks and query numbers for incoming SMS
What the libfolks implementation does:
- adds a contact-row for each phone number of a folks-individual to Chatty's contacts list
- if a contact is not available in Chattys contacts list, it will be queried for incoming SMS, or when a chat is initiated via URI
- stores the GNOME display-name and the avatar in blist.xml
- fixes several icon issues in the UI and shows the user avatar in the chat details
Closes #184 (closed)
Edited by Andrea Schaefer