Version 5.0

"Projections" greatly enhance the configurability of rails.vim.  See the help.
Drop R from navigation commands (:Emodel, :Smodel, etc).  Old commands are still supported.
Navigation commands provide boilerplate on file creation.
Run tests with :Rrunner.
Load :Rails new/:Rgenerate/:Rdestroy results into quickfix.
Assorted Rails 4 updates.
:Rails replaces deprecated :Rscript.
Extract concerns and helpers with :Rextract.
Switch :Elib default to Gemfile.
Switch :Emigration 0 to db/seeds.rb.
Add :Eschema navigation command.
Remove support for plugins, including navigation command.
Detect and support engines with bundler.vim.
Better :Rpreview support for finding the currently running server.
Indent settings are no longer automatically adjusted.  Try sleuth.vim.
Remove configuration provisions superseded by projections.
Remove assorted seldom used features.