Seems that NULL is indeed a special value in SQL

Including a condition check for NULL in the phone query.

Signed-off-by: Daniele Ricci <daniele.athome@gmail.com>
Fix i18n

Signed-off-by: Daniele Ricci <daniele.athome@gmail.com>
Invalidate contact cache after receiving vCard

Signed-off-by: Daniele Ricci <daniele.athome@gmail.com>
Test and fix chat invitation UI (closes #72)

Also proper notification support and other fixes

Signed-off-by: Daniele Ricci <daniele.athome@gmail.com>