[web] added line to explain how to add pages to navbars

[LEDE Commits]

jow pushed a commit to web.git, branch master:
https://git.lede-project.org/5cdfca5d3213fcb7339beb718e76269ebf9e92e5

commit 5cdfca5d3213fcb7339beb718e76269ebf9e92e5
Author: bobafetthotmail <starshipeleven at outlook.com>
AuthorDate: Sun Jul 17 19:47:05 2016 +0200

    added line to explain how to add pages to navbars
    
    because there are already 4 pages without a link and were therefore not reachable without knowing the link beforehand.
    
    So adding documentation of documentation sounds good to me.
---
 README | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/README b/README
index 4379139..1b8a9c7 100644
--- a/README
+++ b/README
@@ -9,6 +9,10 @@ All pages should follow these rules
 Top level pages are located in this directory while the "Documentation"
 can be found in the docs/ sub-folder.
 
+The _includes/ folder contains the html structure of the site navbars, 
+if you add a page please add it in the respective nav bar so that it 
+becomes reachable.
+
 The website is generated from asciidoc using jekyll invoked by a cron script
 every 15 minutes.