[contactsd] Add sim plugin to make SIM contacts available automatically
[contactsd] Synchronize SIM contact phone number details

As well as synching the contacts read from SIM, ensure the stored
phone number details match the values read from SIM.
[contactsd] Only respond to changes of SIM presence
[contactsd] Reflect changes in phone number properties
Merge pull request #14 from matthewvogt/sim

[contactsd] Add sim plugin to make SIM contacts available automatically