Fail to build when the first menu item is different than $BASE_URL

[Vloupmon]

If the URL of the first menu item in config.toml is not $BASE_URL, then the build will fail.

For example, this builds :

menu_items = [
    {name = "test", url = "$BASE_URL"},
]

This doesn't build :

menu_items = [
    {name = "test", url = "http://test.test"},
]

It can be worked around with a nameless menu entry :

menu_items = [
    {name = "", url = "$BASE_URL"},
]

[pawroman]

This definitely is a bug. Unfortunately I don't really have the time to fix that now. But having the workaround handy might definitely help other people using the theme, thanks!

If you'd be so kind to contribute the workaround to the README, I'd merge that happily.

[jocutajar]

the pull request #19 fixes this for me:

Failed to build the site
Error: Failed to render page '/.../content/mypage/index.md'
Reason: Failed to render 'page.html': error while rendering macro `menu_macros::menu` (error happened in a parent template)
Reason: Variable `current_item` not found in context while rendering 'macros/menu.html'