ANNOUNCED: nondestructive_migrations is now nonschema_migrations

[jasonfb]

nondestructive_migrations is now nonschema_migrations

This new gem (nonschema_migrations) can be a drop-in replacement. Please note the version numbers have changed.

Users of nondestructive_migrations can replace

gem 'nondestructive_migrations'

with

gem 'nonschema_migrations'

Please see README in nonschema_migrations for the correct version to match your Rails version.

It was renamed 1) to make a clean break from the old, somewhat more messy implementation, and 2) in deference to @alexch's objection lodged over its slightly inaccurate name. I hope this renaming more accurately reflects the code's intentions.

cc: @mfazekas @polarlights @dzader @bmchrist

[jasonfb]

cc: @lydiamnash @sgringwe