Problem Description:

A Zsshtml project's resource file (excelStyle.css) is not included in compiled result, because the project's structure doesn't match Maven's default structure, non-Java file will not be automatically copied to compiled result folder (target/classes)

Reproducing Steps:

1. compare the src/org/zkoss.zss.model/impl/html and target/classes/org/zkoss.zss.model/impl/html

Expected:
excelStyle.css exists in target/classes/org/zkoss.zss.model/impl/html

Actual:
excelStyle.css doesn't exist in target/classes/org/zkoss.zss.model/impl/html