Add an option for file content as a string in an attachment Map

[vysakh0]

Previously, we could send an attachment like this

attachments: [%{path: "/tmp/image.png", filename: "img.png"}]

When one is generating a pdf or any files on the fly, one has to write this as a temporary file in some place before sending it as an attachment.

So with this, one could also send the file content like this

def send_greetings(user, file_path) do
    file_content = File.read!(file_path)
    send_email to: user.email,
               from: @from,
               subject: "Happy b'day",
               html: "<strong>Cheers!</strong>",
              attachments: [%{content: file_content, filename: "img.png"}]
end

[chrismccord]

This looks great! Can you add a section to the @moduledoc about sending attachments in general, the options, and include this new feature in the examples?

[vysakh0]

Sure :+1:

[vysakh0]

I've added the moduledoc, can you please take a look?

[vysakh0]

@chrismccord There wasn't an existing @moduledoc, so added few examples that were part of README, please review if it is okay.

[chrismccord]

<3 <3 <3

[vysakh0]

Wow, awesome, I was hesitant to give pull request at first (bit embarrassed about the code) thank you @optikfluffel for the nudge and chrismccord for merging :+1:

:heart: :green_heart: :blue_heart: :purple_heart: to the elixir community :+1: