Continual updates until merged

tools/travis/build_tools.sh

@@ -6,7 +6,7 @@ set -e
 if [ "$BUILD_TOOLS" = true ];
 then
     md5sum -c - <<< "49bc6b1b9ed56c83cceb6674bd97cb34 *html/changelogs/example.yml";
-    cd tgui && source ~/.nvm/nvm.sh && gulp && cd ..;
+    (cd tgui && source ~/.nvm/nvm.sh && npm ci && node node_modules/gulp/bin/gulp.js --min)
     phpenv global 5.6
     php -l tools/WebhookProcessor/github_webhook_processor.php;
     php -l tools/TGUICompiler.php;

tools/travis/install_build_tools.sh

@@ -5,7 +5,6 @@ source dependencies.sh
 
 if [ "$BUILD_TOOLS" = true ]; then
       rm -rf ~/.nvm && git clone https://github.com/creationix/nvm.git ~/.nvm && (cd ~/.nvm && git checkout `git describe --abbrev=0 --tags`) && source ~/.nvm/nvm.sh && nvm install $NODE_VERSION
-      npm install -g gulp-cli
       pip3 install --user PyYaml -q
       pip3 install --user beautifulsoup4 -q
 fi;