Toggle search link in header with include_search

[cudmore]

I've added a yml variable 'include_search' to toggle the search link on and off in nav.html

what do you think?

p.s. This is the first time I have done a pull request on Github. Thus, I have NO IDEA what I am doing or if I have done this correctly.

[chrissimpkins]

Will have a look this weekend. Thank you!!

[chrissimpkins]

Sorry forgot about this! Will try to merge it this week.

[SinisterMinister]

Has this been tested? Looking at the MkDocs documentation, it should be if config.extra.include_search.

[SinisterMinister]

I'd go ahead and wrap the <script data-main="{{ base_url }}/mkdocs/js/search.js" src="{{ base_url }}/mkdocs/js/require.js"></script> in base.html so that it's not doing things unnecessarily if you've disabled the search.

Also, it might be better semantically to have the field be disable_search instead since it's enabled by default in MkDocs. The way it's currently written it would default to being disabled.

[chrissimpkins]

Will require a rebase on the changes made to support MkDocs project changes in order to merge this. Feel free to reopen if you are able to do this work. Sorry...