Added Array#flush.
lib/nuggets/array/mean_mixin.rb (report_mean): Added support for flat arrays.
spec/nuggets/array/variance_spec.rb: Added more examples.
lib/nuggets/env/user_home_mixin.rb (user_home): Use Dir.home if available.
lib/nuggets/midos.rb (Writer#write): Don't modify values in-place.
lib/nuggets/ruby.rb (ruby_options_to_argv): Cosmetics...
lib/nuggets/uri/redirect_mixin.rb (follow_redirect): Rescue Errno::ENOENT as well.
lib/nuggets/lsi.rb: Refactored and extended.