Added endTime to schedule.json
Legacy CSS code fixed
Added UGs and banners.html
Added media partner
Update banners.html
Added tags to talks
Added additional Promo materials
Added Menu link to Press
Added margin to top-menu
- Improved CSS minimisation.
- Added versions for CSS/JS files.
- Some libs downloaded from external resources to internal.
- Made separation between libs and project js.
Merge remote-tracking branch 'origin/master'

Conflicts:
	assets/css/styles.css
	banners.html
Changes after merge.
#2 Make Register button larger.
Added two additional sponsors
Refactored .less to nested rules
Added additional Media Partner
Added additional partners
Additional media partner
Banner code fixed. Added link on Logo.
Added additional UG