Add railtie

[guillec]

• Fixed README example
• Add railtie so if the gem is added to a rails project it registers a mime type to
  respond to application/json-patch+json

Based on conversation with @steveklabnik steveklabnik/merge_patch_test#2 (comment)

[tenderlove]

Can you change this file to 'hana/railtie'? It probably wouldn't be good to have a "railtie" file at the top level.

[steveklabnik]

Yes, that's a good call.

[steveklabnik]

Oh wait, this isn't my repo o_O. I'm sure @guillec will update it :)

[guillec]

Will do

[steveklabnik]

@guillec ! Any chance you can update this? 😉

[guillec]

@steveklabnik sorry :( yeah I will get do it this weekend.

On Sun, Jun 8, 2014 at 11:01 PM, Steve Klabnik notifications@github.com
wrote:

@guillec https://github.com/guillec ! Any chance you can update this? [image:
😉]

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#3 (comment).

[guillec]

@tenderlove @steveklabnik updated per your suggestion.

[asterite]

Why can't this be in another gem? I don't think it's a good practice to include Rails stuff everywhere.

For example, I plan to use this gem in a project. It's super simple, just one file, specific for the purpose of json-patch. With this PR, I'll have more code around which I won't use. I know it doesn't really affect the code if I don't require it, but it just feels messy to throw all code in a single gem. Maybe hana-rails would be better.