Changed the .gitlab-ci.yml structure

Beginned with new building system
.gitlab-ci.yml can now be generated by the script assemble-gitlab-ci.py.

Therefore the .gitlab-ci.yml configuration file can be split into several smaller files

CI/ci-linux-build.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+source CI/ci-linux-prepare.sh
+
+echo -e "${OUTPUT}"
+echo ""
+echo "======================================================================"
+echo "Basic configuration details:"
+echo "======================================================================"
+echo -e "${NC}"
+
+echo "Compiler:     $COMPILER"
+echo "Options:      $OPTIONS"
+echo "Language:     $LANGUAGE"
+echo "Make Options: $OPTIONS"
+echo "BuildPath:    $BUILDPATH"
+echo "Path:         $PATH"
+echo "Language:     $LANGUAGE"
+
+echo -e "${OUTPUT}"
+echo ""
+echo "======================================================================"
+echo "Building $BUILD_TYPE version with vectorchecks enabled"
+echo "======================================================================"
+echo -e "${NC}"
+
+if [ ! -d build-$BUILD_TYPE_L-$BUILDPATH-Vector-Checks ]; then
+  mkdir build-$BUILD_TYPE_L-$BUILDPATH-Vector-Checks
+fi
+
+cd build-$BUILD_TYPE_L-$BUILDPATH-Vector-Checks
+
+cmake -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DOPENMESH_BUILD_UNIT_TESTS=TRUE -DSTL_VECTOR_CHECKS=ON $OPTIONS ../
+
+#build it
+make $MAKE_OPTIONS
+
+cd ..