LB-1664 Clean up repo

Added to .gitignore
removed __init__.py (this should go directly into Liveblog repo)
npm-debug.log should be in repo.
LB-1664 Refactor css

Pass liveblog.servers.css into embed code.
Fallback liveblog.servers.css to liveblog.servers.rest instead of
liveblog.servers.frontend.

So it will take configuration for loading nodejs or remote css.
When not specified liveblog.servers.css default will fallback to
liveblog.serves.rest
Css takes also the liveblog.paths.css correctly now.

Ex:
For loading nodejs css file from themes.

liveblog.servers.css = "<%= liveblog.servers.frontend %>" with
liveblog.paths.css = "/"

For loading remote css file from themes.

no liveblog.servers.css with
liveblog.paths.css = "/content/lib/embed/" or "/content/lib/livedesk-
embed/"
LB-1664 Refactored loader.

Removed defaults paths
Fallback liveblog.servers.frontend to liveblog.servers.rest
and viceversa.
LB-1664 Added Liveblog files to gitignore.

all python and python compiled files.
setup.cfg
and html for testing.
Merge pull request #150 from nistormihai/blog-model-test

Blog model test
Merge pull request #149 from nidzix/master

LB-1706 : Update STT themes
LB-1709 : As a user at Tageswoche, I want my production instance of Live Blog to be on the latest version