Update README

Author: junichi11

README.md

@@ -17,6 +17,7 @@ This is NetBeans plugin for WordPress.
 - create new theme action
 - hyperlink navigate
 - create new plugin action
+- custom content name
 
 ### Impotant Files
 It contains wp-config.php
@@ -29,6 +30,11 @@ You can create a new WordPress project with Wizard.
 3. choose options
 4. finish
 
+### Custome Content Name
+
+If you want to use custom content name(default is `wp-content`), please set your content name to the project properties.
+(project properties > Framework > WordPress)
+
 #### options
 - Set format to project : set format option to project.properties
 - create wp-config.php : copy from wp-config-sample.php