add logger to MediaWiki.fetch
media component
better var name,
style fixes
lazymixin,
lazyload images with
remove sloth and lazyload

now we have bit more controll on images in page
copy just an img element
lazy -> visible mixin
some comments for meda light box
this causes some problems with recompiling sass
we can think how to optimize it later
fixes for visible mixin
disable image animation
add caption
small refactor
add empty gif
scsscomb
small fixes for media scss
update typings
Merge branch 'master' into HG-88-improve-placeholder

Conflicts:
	gulp/tasks/sass.js
use mediamodel
some comments
find function for media
media interface
use updated mediamodel
Added response X-Response-Time header to responses
lock browser sync as with new there is some problem
unit test fixes
use global model for media
some comments for media lightbox