Add ARK PubId Plugin by lurymorais (v2.0.0.0)

[lurymorais]

This pull request adds the ARK PubId Plugin (v2.0.0.0) to the gallery, compatible with OJS 3.5.0.x.
Repository: https://github.com/lurymorais/ark-plugin

[asmecher]

Thanks, @lurymorais! I do recommend changing the following...

<version>3.5.0.0</version>
<version>3.5.0.1</version>
<version>3.5.0.2</version>
<version>3.5.0.3</version>
<version>3.5.0.4</version>

...for the semantic versioning form, which is more future-proof:

<version>~3.5.0.0</version>

@bozana, would you mind taking a look at the plugin?

[lurymorais]

Thanks, @lurymorais! I do recommend changing the following...

<version>3.5.0.0</version>
<version>3.5.0.1</version>
<version>3.5.0.2</version>
<version>3.5.0.3</version>
<version>3.5.0.4</version>

...for the semantic versioning form, which is more future-proof:

<version>~3.5.0.0</version>

@asmecher Done!