feat(logo): updated logo, adding svg,

refs #3253
chore(style): removed old elab style

refs #3252
feat(style): updated koala.upb style

refs #3251
feat(style): updating logo

closes #3253
feat(style): adding custom footer

refs #3325
feat(startpage): dynamic maintanance page

refs #3324
feat(startpage): dynamic maintanance page

refs #3324
feat(style): updated uni layout

refs #3325, #3229
feat(chore): prepare new version (2.8.1)
Merge branch 'release/2.0.0'