switch to uglifyjs instead of closure compiler
diff --git a/static/CMakeLists.txt b/static/CMakeLists.txt
index 8011e6e..c34487f 100644
--- a/static/CMakeLists.txt
+++ b/static/CMakeLists.txt
@@ -76,11 +76,9 @@
     # string(REGEX REPLACE "(\\.[^.]*$)" ".min\\1" OUTPUT_FILENAME ${OUTPUT_FILENAME})
     file(MAKE_DIRECTORY "${FOLDERNAME}")
     add_custom_command(OUTPUT ${MINIFIED_FILENAME} 
-        COMMAND closure-compiler --language_in=ECMASCRIPT5
-        --js  "${CMAKE_CURRENT_SOURCE_DIR}/${JAVASCRIPT_ASSET}"
-        --js_output_file "${MINIFIED_FILENAME}"
-            --compilation_level SIMPLE_OPTIMIZATIONS
-            --angular_pass 
+        COMMAND uglifyjs --compress --mangle  
+        --output "${MINIFIED_FILENAME}"
+        "${CMAKE_CURRENT_SOURCE_DIR}/${JAVASCRIPT_ASSET}"
         DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/${JAVASCRIPT_ASSET}"
         COMMENT "Minifying ${JAVASCRIPT_ASSET}"
     )