Add HTMLProofer with custom options for Travis

* Use more modern APT installation on Travis not requiring `sudo`
* Install `libcurl4-openssl-dev` to prevent HTMLProofer OpenSSL issues
  (gjtorikian/html-proofer#376)
* Use custom HTMLProofer to allow specifying a sensible `timeout` option (the
  `htmlproofer` command-line does not support options)

.travis.yml

@@ -1,5 +1,10 @@
-sudo: required
 dist: trusty
+addons:
+  apt:
+    packages:
+      - curl
+      - libcurl4-openssl-dev
+      - environment-modules
 language: python
 python:
   - "2.7"
@@ -10,7 +15,6 @@ cache:
   directories:
     - $HOME/sw/TARS
 before_install: |
-  sudo apt-get install -y curl environment-modules
   cd ..
   git clone -b IB/v5-06/next https://github.com/alisw/alidist
 install: |

script/cibuild

@@ -37,5 +37,5 @@ time coverage run -a alibuild/aliBuild version
 # test the docs
 pushd alibuild
   jekyll build -s docs -d _site --baseurl .
-  htmlproofer ./_site
+  script/custom_htmlproofer.rb
 popd

script/custom_htmlproofer.rb

@@ -0,0 +1,5 @@
+#!/usr/bin/env ruby
+require 'html-proofer'
+HTMLProofer.check_directory("./_site",
+                            :parallel => { :in_processes => 3 },
+                            :typhoeus => { :timeout => 100, :ssl_verifyhost => 2 }).run