fixes #4958: add version to minified js

Makefile

@@ -28,7 +28,7 @@ build:
 	@echo "Compiling documentation...                  ${CHECK} Done"
 	@cat js/bootstrap-transition.js js/bootstrap-alert.js js/bootstrap-button.js js/bootstrap-carousel.js js/bootstrap-collapse.js js/bootstrap-dropdown.js js/bootstrap-modal.js js/bootstrap-tooltip.js js/bootstrap-popover.js js/bootstrap-scrollspy.js js/bootstrap-tab.js js/bootstrap-typeahead.js js/bootstrap-affix.js > docs/assets/js/bootstrap.js
 	@uglifyjs -nc docs/assets/js/bootstrap.js > docs/assets/js/bootstrap.min.tmp.js
-	@echo "/**\n* Bootstrap.js by @fat & @mdo\n* Copyright 2012 Twitter, Inc.\n* http://www.apache.org/licenses/LICENSE-2.0.txt\n*/" > docs/assets/js/copyright.js
+	@echo "/**\n* Bootstrap.js v2.1.1 by @fat & @mdo\n* Copyright 2012 Twitter, Inc.\n* http://www.apache.org/licenses/LICENSE-2.0.txt\n*/" > docs/assets/js/copyright.js
 	@cat docs/assets/js/copyright.js docs/assets/js/bootstrap.min.tmp.js > docs/assets/js/bootstrap.min.js
 	@rm docs/assets/js/copyright.js docs/assets/js/bootstrap.min.tmp.js
 	@echo "Compiling and minifying javascript...       ${CHECK} Done"

docs/assets/js/bootstrap.min.js

 /**
-* Bootstrap.js by @fat & @mdo
+* Bootstrap.js v2.1.1 by @fat & @mdo
 * Copyright 2012 Twitter, Inc.
 * http://www.apache.org/licenses/LICENSE-2.0.txt
 */