Update README.md

JRuby on master *and* tags

v0.10.0.alpha3

Err when duplicate variables

Err on duplicate variables

Only env-intercept variables from required groups

Only intercept variables from required groups

Resolve "key_alias using rails makes `envied check` barf"

If rails-project, require rails

Have production-environment

Add env-type

Add bin/envied for development

Remove magic numbers

Next release as version

Document env-type