Add main.rs for simple testing
Add initial vector implementation.
Add some generics.
Add generic tests for vector.
Split vector implementation.
Small refactoring.
Improve my pers vector.
Generics.
Implement modification by index.
Merge pull request #1 from zaic/pers-vector

Pers vector
Start kuchevo implementation.
It's compiling.
Rename.
Add kuchest
Impelement Kuchevo using Rc
Using generics.
Implement inserting.
Implement erasing.
Add Persisten Map structure.
Improve switch to specific revision from O(N) to O(lg(N)) in FatNode