ATS-421 : Create Travis build for "alfresco-transform-core" (#21)

* ATS-421 : ATS-400: Create Travis build for "alfresco-transform-core"
   - rename mvn profile from 'enterpriseDocker' to 'local'
   - add config to publish docker image on both Quay and Docker
   - remove unused 'master' profile - similar to ATS, publish images only from master branch and on Release
   - update <distributionManagement> to publish artefacts to Nexus public (rather than Enterprise Releases)
   - add travis build configs
   - include SP branches to travis build
  - add documentation on build&release process

_ci/build.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+echo "=========================== Starting Build&Test Script ==========================="
+PS4="\[\e[35m\]+ \[\e[m\]"
+set -vex
+pushd "$(dirname "${BASH_SOURCE[0]}")/../"
+
+# Always build the image, but only publish from the "master" branch
+[ "${TRAVIS_PULL_REQUEST}" = "false" ] && [ "${TRAVIS_BRANCH}" = "master" ] && PROFILE="internal" || PROFILE="local"
+
+mvn -B -U \
+    clean install \
+    -DadditionalOption=-Xdoclint:none -Dmaven.javadoc.skip=true \
+    "-P${PROFILE}"
+
+docker ps -a -q | xargs -r -l docker stop ; docker ps -a -q | xargs -r -l docker rm
+
+popd
+set +vex
+echo "=========================== Finishing Build&Test Script =========================="
+