Merge branch 'hotfix/fix_images'

* hotfix/fix_images:
  add other images
  fix images
  fix images
add lecture-icon
replace images
remove i'm going button
Merge branch 'feature/lectures_index_2' into develop

* feature/lectures_index_2:
  remove i'm going button
  replace images
  add lecture-icon
Merge branch 'develop'

* develop:
  remove i'm going button
  replace images
  add lecture-icon
  edit lectures page
  fix admin``
add phrase about no lectures
Merge branch 'develop'

* develop:
  add phrase about no lectures
fix fullname
Merge branch 'hotfix/fix_lector_name' into develop

* hotfix/fix_lector_name:
  fix fullname