Update appveyor / Travis-CI.

Based on https://github.com/shlomif/perl6-CI-Gen and
https://github.com/shlomif/ci-gen-framework .

See:

* https://en.wikipedia.org/wiki/Travis_CI

* https://en.wikipedia.org/wiki/Continuous_integration .

.travis.bash

@@ -46,7 +46,7 @@ then
     sudo -H `which python3` -m pip install beautifulsoup4 bs4 cookiecutter lxml pycotap vnu_validator WebTest Zenfilter
     perl bin/my-cookiecutter.pl
     # For various sites
-    cpanm --notest HTML::Toc
+    cpanm --notest HTML::Toc XML::Feed
     deps-app plinst -i bin/common-required-deps.yml -i bin/required-modules.yml
     gem install asciidoctor compass compass-blueprint
     ( cd .. && git clone https://github.com/thewml/wml-extended-apis.git && cd wml-extended-apis/xhtml/1.x && bash Install.bash )

.travis.yml

@@ -16,6 +16,7 @@ addons:
             - docbook-xsl-ns
             - fortune-mod
             - graphicsmagick
+            - hspell
             - hunspell
             - hunspell-en-gb
             - inkscape
@@ -29,6 +30,7 @@ addons:
             - libperl-dev
             - libxml2-dev
             - mercurial
+            - myspell-he
             - lynx
             - optipng
             - perl