v0.2.0

Changelog

0.2.0

Implement 3 nested cvec
Implement 2 nested cvec
Improve of cset macro using Iterators methods (doesn't bring a lot of performance improvements, but the code is cleaner)
Macro time now prints to stderr and format the time to 6 digits after the dot
Improve of cmap macro using Iterators methods (doesn't bring a lot of performance improvements, but the code is cleaner)
Improve performance of cvec macro using Iterators methods