using Travis-CI for checking pull-request about kicad-doc HOT 2 OPEN

update .travis.yml and include utils/travis/build.sh in it.

language: bash
dist: trusty
sudo: required
cache: apt
before_script:
  - sudo apt-get -qq update
  - sudo apt-get install -y asciidoc pandoc gettext po4a dblatex
  - sudo apt-get install -y source-highlight
  - sudo apt-get install -y fonts-freefont-ttf fonts-vlgothic
  - sudo apt-get install -y texlive-xetex
  - sudo apt-get install -y texlive-lang-cjk
  - sudo apt-get install -y texlive-lang-cyrillic
  - sudo apt-get install -y texlive-lang-dutch
  - sudo apt-get install -y texlive-lang-english
  - sudo apt-get install -y texlive-lang-french
  - sudo apt-get install -y texlive-lang-german
  - sudo apt-get install -y texlive-lang-italian
  - sudo apt-get install -y texlive-lang-polish
  - sudo apt-get install -y texlive-lang-spanish
script: mkdir build && cd build && cmake .. && make -j4

from kicad-doc.

container base .travis.yml should be below, but this doesn't work.

language: bash
dist: trusty
sudo: false
cache: apt
addons:
  apt:
    packages:
      - asciidoc
      - pandoc
      - gettext
      - po4a
      - dblatex
      - source-highlight
      - fonts-freefont-ttf
      - fonts-vlgothic
      - texlive-xetex
      - texlive-lang-cjk
      - texlive-lang-cyrillic
      - texlive-lang-dutch
      - texlive-lang-english
      - texlive-lang-french
      - texlive-lang-german
      - texlive-lang-italian
      - texlive-lang-polish
      - texlive-lang-spanish
script: mkdir build && cd build && cmake .. && make -j4

from kicad-doc.