update. Update publications readme.

Gemfile.lock

 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (5.0.1)
+    activesupport (5.0.2)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (~> 0.7)
       minitest (~> 5.1)
@@ -18,16 +18,16 @@ GEM
     coderay (1.1.1)
     colorator (1.1.0)
     colored (1.2)
-    concurrent-ruby (1.0.4)
+    concurrent-ruby (1.0.5)
     csl (1.4.5)
       namae (~> 0.7)
     csl-styles (1.0.1.7)
       csl (~> 1.0)
     ethon (0.10.1)
       ffi (>= 1.3.0)
-    ffi (1.9.17)
+    ffi (1.9.18)
     forwardable-extended (2.6.0)
-    html-proofer (3.4.0)
+    html-proofer (3.5.0)
       activesupport (>= 4.2, < 6.0)
       addressable (~> 2.3)
       colored (~> 1.2)
@@ -36,8 +36,8 @@ GEM
       parallel (~> 1.3)
       typhoeus (~> 0.7)
       yell (~> 2.0)
-    i18n (0.7.0)
-    jekyll (3.3.1)
+    i18n (0.8.1)
+    jekyll (3.4.1)
       addressable (~> 2.4)
       colorator (~> 1.0)
       jekyll-sass-converter (~> 1.0)
@@ -91,7 +91,7 @@ GEM
     safe_yaml (1.0.4)
     sass (3.4.23)
     slop (3.6.0)
-    thread_safe (0.3.5)
+    thread_safe (0.3.6)
     typhoeus (0.8.0)
       ethon (>= 0.8.0)
     tzinfo (1.2.2)
@@ -112,4 +112,4 @@ DEPENDENCIES
   rake
 
 BUNDLED WITH
-   1.14.3
+   1.14.6

publications/README.md

@@ -13,5 +13,5 @@ Files should be named by their key in the publications BibTeX file, suffixed wit
 
 Technical reports should be named as ***bibtex_key***.techreport.***ext***
 
-Additional file types are also supportable, see /_layouts/publication.html to add extra ones to the supplimentary
-material section of a publication page.
+Additional file types are also supportable, see [the README in the website root (as published
+online)](https://psvg.doc.ic.ac.uk/README.html) for the full list.