Small tweak to the importing

Adding in 7.x code in new branch

Way to many changes to list, but og dependancy has been removed, and most things
work except add/remove lines from invoices, quotes etc.

removed current(row)->xxx syntax php4 doesn't like.

Still buggy

Read INSTALL.txt for a brief rundown/howto.
There is one glitch, which I fixed with a small patch, attached to this
issue - http://drupal.org/node/111345
Just commenting out the _block_rehash will work in the short term

This should fix the problems with putting erp modules in sites/all.
Also fixed theme_add_style vs drupal_add_css problem

Added DEVELOPER.txt file to document some of the hooks

Updated _view hooks

but there are still quite a few things to be done.

development can restart.

to use it.