[ofono] monitor network properties changes before retrieval

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>
[ofono] check interfaces instead of features

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>
use bitset instead of array<bool...> for status relations

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>
rpm: fixed devel package dep typo

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>
Merge pull request #13 from deztructor/master

check interfaces instead of features and monitor network properties changes before retrieval