- update to 0.6.6
- add and update URLs of MASTER_SITES
- update author's email address
- use @dirrmtry
- change port category from math to science.
- Completes repo copy from math/ruby-netcdf -> science/ruby-netcdf
PR: ports/165314
Submitted by: Shin-ya Murakami <murashin@gfd-dennou.org>