Hedgehog in the cage (Ježek v kleci)

**Update 4th June 2018:** added simple cage version - doesn't need supports

"Ježek v kleci" (hedgehog in the cage) is a puzzle very popular in Czech Republic and some other countries because of famous set of adventure books where it's the main artifact everyone is looking for. [EN Wikipedia](https://en.wikipedia.org/wiki/Hedgehog_in_the_Cage), [CZ Wikipedia](https://cs.wikipedia.org/wiki/Je%C5%BEek_v_kleci)

Scaling of holes and spines was inspired by official model for Hedgehog-freeing Wor