Mobile improvements and bug fixes

Contributor: @aschempp

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• Remove link in PDF (#5)
• Labels can now be multilingual
• Hide label on mobile view (prevents ugly breaks in social icons)

Gitbook 2.0.1 compatibility

Contributor: @todvora

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Gitbook 2.0.1 has removed page:after hook which this plugin needs. An issue has been reported here - GitbookIO/gitbook#724 but meanwhile this plugin is using workaround added by this pull request - #4

So when using Gitbook 2.0.1, you may see following warning in console at the time of running build:

warn: hook 'page' used by plugin 'gitbook-plugin-edit-link' is deprecated, and will be remove in the coming versions

You can safely ignore above warning for now.

Multilingual gitbook support

Contributor: @aniav

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Multilingual gitbook support added by @aniav (#2)