Adding folder for ci scripts, and initial script for packaging repo

ci/build.sh

+#sass sass:static/css -r templates/sass/bourbon/lib/bourbon.rb --style :compressed
+
+if [ -z "${GIT_COMMIT}" ]; then
+    GIT_COMMIT=$(git rev-parse HEAD)
+fi
+
+if [ -z "${GIT_BRANCH}" ]; then
+    GIT_BRANCH=$(git symbolic-ref -q HEAD)
+    GIT_BRANCH=${GIT_BRANCH##refs/heads/}
+    GIT_BRANCH=${GIT_BRANCH:-HEAD}
+fi
+
+if [ -z "${BUILD_NUMBER}" ]; then
+    BUILD_NUMBER=dev
+fi
+
+ID=mitx-${GIT_BRANCH}-${BUILD_NUMBER}-${GIT_COMMIT}
+tar --exclude=.git --exclude=build -czf build/${ID}.tgz ${REPO}