Copying build-related files from master

.travis.yml

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+sudo: required
+before_install:
+- sudo apt-get -qq update
+- sudo apt-get install texlive texlive-latex3
+- sudo apt install texlive-latex-extra
+script:
+- ./build.sh
+deploy:
+  provider: script
+  script: ./travis_deploy.sh
+  skip_cleanup: true
+  on:
+    branch: master
+env:
+  global:
+    - ENCRYPTION_LABEL="19a81de38b62"
+    - COMMIT_AUTHOR_EMAIL="[email protected]"
+    - COMMIT_AUTHOR="Travis CI"
+    - PUSH_REPO="[email protected]:ethereum/yellowpaper.git"

build.sh

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+#!/usr/bin/env bash
+
+set -e
+
+if [ -d ".git" ]; then
+
+SHA=`git rev-parse --short --verify HEAD`
+DATE=`git show -s --format="%cd" --date=short HEAD`
+REV="$SHA - $DATE"
+
+else
+
+REV="unknown revision"
+
+fi
+
+echo "\newcommand{\YellowPaperVersionNumber}{$REV}" > Version.tex
+
+pdflatex -interaction=errorstopmode -halt-on-error Paper.tex && \
+bibtex Paper && \
+pdflatex -interaction=errorstopmode -halt-on-error Paper.tex && \
+pdflatex -interaction=errorstopmode -halt-on-error Paper.tex && \
+pdflatex -interaction=errorstopmode -halt-on-error Paper.tex