thanks to ruflin.com for adding svn:externals into Simple Invoices
- the simplest way to keep the Zend Framework up to date

svn propedit svn:externals library

Zend http://framework.zend.com/svn/framework/standard/tags/release-1.7.5/library/Zend/

now once theres a new zf release we want just edit the svn props and its all good :)

http://svnbook.red-bean.com/en/1.0/ch07s03.html