LB-1384 Implement plugin system
Added test plugin
Added for zeit theme desktop.
Merge branch 'LB-1384' of github.com:nistormihai/plugin-liveblog-embed-server into LB-1384

Conflicts:
	config.json
LB-1384 Some adjustments to the structure.
LB-1384 Cleaner is better

Use the initialize backbone method instead of class definitions.
LB-1384 Typos fixed.
Merge pull request #37 from nistormihai/LB-1384

Lb 1384 Implement plugin system