Expose getTechnology() to QML

It's useful in situations where all the technologies are listed at
once from technologiesList() where we only have the technology name
and need a NetworkTechnology object.
Connected property

Add the connected property to TechnologyModel.
Get a specific NetworkService

This method returns a specific NetworkService object and is available
from QML.
Merge pull request #50 from plfiorini/connected

Connected property
Merge pull request #49 from plfiorini/invokable

Expose getTechnology() to QML
Merge pull request #51 from plfiorini/getindex

Get a specific NetworkService
Merge pull request #52 from lpotter/master

[connman-qt] set delayedReply on request dbus message.
[connman-qt] bump version to 1.0.18
Honour runningChanged() signaling
Merge pull request #53 from chgans/master

Honour runningChanged() signaling
[connman-qt] fix crash when connmand gets restarted.