Update sponsors.yaml

+Samsung
Update sponsors.yaml
Update speakers.yaml

+Bartłomiej Kuczyński
Update speakers.yaml
Update speakers.yaml
Update sponsors.yaml

zmiana linku samsunga
Updated meteor version.
Added new speakers pictures.
Working on workshops...
Added oreilly logo.
Added The Pragmatic Bookshelf partner.
Added workshop example data.
Stylistic amendment
Removed Tomek Nurkeiwicz
Added new speakers pictures.
Allegro & Spartez logo added.
Added ranks for all sponsors.
Allegro & Spartez added to sponsors.yaml.
Pragmatic bookshelf and O'Reilly added to partners section.
typo and language fix