fix: Check that ace plugin is loaded after include-codeblock

[gdolle]

gitbook-plugin-include-codeblock must be loaded before gitbook-plugin-ace.

Changelogs:

• Update readme
• Add winston plugin for color logs.
• Check gitbook plugin ordering.
  • gitbook-plugin-ace not required! => display warning for ace templates
  • gitbook-plugin-ace loaded => check ordering (return error if loaded before include-codeblock)
• Add tests for different templates (default, ace, custom)

Related

fix #40

[gdolle]

@azu done

I'll refactor a bit the code in another PR. (plugin book options does not work as expected)

[azu]

@gdolle Merge it and release https://github.com/azu/gitbook-plugin-include-codeblock/releases/tag/3.0.1 Thanks.