[examples] register pictures on examples installation

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jollamobile.com>
[tests] adding unit tests

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jollamobile.com>
[the-vault] system configuration, api changes

API is modified for consistency, module was function -> function .use().

Added system configuration to be used to access global information,
e.g. available modules etc. Option 'global' in CLI is used to update
global configuration and now it can be used to install system-wide
modules

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jollamobile.com>
registering example module in global config

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jollamobile.com>
version bump

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