removed travis added gitlabci

.travis.yml

-sudo: false
-os: linux
-language: haskell
-addons:
-  apt:
-    packages:
-    - texlive-latex-recommended lmodern texlive-fonts-recommended texlive-latex-extra
-      texlive-fonts-extra dvipng texlive-latex-recommended texlive-lang-french
-before_install:
-  - sudo add-apt-repository -y ppa:jonathonf/python-2.7
-  - sudo apt-get update
-  - sudo apt-get install python2.7
-install:
-- wget https://github.com/jgm/pandoc/releases/download/2.0.6/pandoc-2.0.6-1-amd64.deb
-- sudo dpkg -i pandoc-2.0.6-1-amd64.deb
-- wget https://github.com/lierdakil/pandoc-crossref/releases/download/v0.3.0.1/linux-ghc80-pandoc20.tar.gz
-- mkdir pandoc-crossref
-- cd pandoc-crossref
-- mv ../linux-ghc80-pandoc20.tar.gz .
-- tar xzvf linux-ghc80-pandoc20.tar.gz
-- cd ..
-- export PATH=`pwd`/pandoc-crossref:$PATH
-- sudo pip install -U pip panflute pandocfilters  pandoc-numbering
-cache:
-- pip
-script:
-- make
-deploy:
-  provider: releases
-  api_key:
-    secure: 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
-  file: cours.pdf
-  skip_cleanup: true
-  on:
-    repo: mathintro/deuxiemeannee
-    tags: true