Check format of .js files in pre-commit hook.

src/hooks/pre-commit.hook

@@ -28,6 +28,31 @@ echo "==========================================================================
 done
 
 
+for file in `git diff-index --cached --name-only HEAD --diff-filter=ACMR| grep "\.js$"` ; do
+    case "$file" in
+        */libs/*)
+            echo "Not checking library ${file}"
+            ;;
+        *)
+            echo "Checking ${file}"
+            nf=`git checkout-index --temp ${file} | cut -f 1`
+            jshint --config .jshint "${nf}"
+            r=$?
+            rm "${nf}"
+            if [ $r != 0 ] ; then
+        echo "================================================================================================="
+        echo " Code format error in: $file                                                                     "
+        echo "                                                                                                 "
+        echo " Please fix before committing. Don't forget to run git add before trying to commit again.        "
+        echo "                                                                                                 "
+        echo "================================================================================================="
+                exit 1
+            fi
+            ;;
+    esac
+done
+
+
 check_styles=0
 for file in `git diff-index --cached --name-only HEAD --diff-filter=ACMR| grep "\.scss$"` ; do
     check_styles=1