[REFACTORING] All spec support files where removed to `spec/support` subfolders.

== Changes

* `spec/factories`    => `spec/support/factories`
* `spec/initializers` => `spec/support/config`
* `spec/support/*.rb` => `spec/support/helpers` and `spec/support/matchers`

All the necessary changes added to:

* `spec/spec_helper.rb`
[REFACTORING] Generators isolated from runtime.

Generators moved from Uuids::Generators to Generators and excluded from runtime loading paths.

== Addons

* `lib/generators.rb` loader for generators.
* `spec/spec_helper_dev.rb` used to test generators in isolation from runtime code.

== Changes

* Uuids::Generators => Generators.
* `lib/uuids.rb` loader doesn't load generators any more.
* `bin/uuids` loads generators only without `lib/uuids.rb`.
* `uuids.gemspec`: `thor` dependency moved from runtime to dev.

== Version

Patch 1.4.1 launched (code refactoring without new features).