upower: pick only battery has non-zero energy and voltage

there can be many devices calling themselves battery... battery should
at least has voltage and energy :)

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jollamobile.com>
adding spec

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jollamobile.com>
contextkit-plugins-n950-n9 spec

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jollamobile.com>
Merge pull request #1 from lpotter/master

rename cellular plugin's Manager class
Fix uninitialized values in keyboard-generic plugin

The output of this plugin was almost always wrong, causing Maliit
to think that a hardware keyboard was available and refuse to show
the onscreen keyboard.
Merge pull request #2 from special/master

Fix uninitialized values in keyboard-generic plugin
[packaging] move to git packaging