Document how to work with relaxed CND

The existing 7.5 documentation on the .org is based on strict CND types (Update All Content) and also refers to reloading CND.

Both are obsolete with 7.6

Searching for "update all content" resulted in:
http://www.onehippo.org/cms7/documentation/user/information_architects/howto/save_documenttype.html
http://www.onehippo.org/cms7/documentation/user/information_architects/howto/create_documenttype.html
http://www.onehippo.org/cms7/documentation/user/information_architects/howto/add_custom_compound.html

(I removed upgrade links)

Check the child pages of http://www.onehippo.org/cms7/documentation/user/information_architects/howto
There are a lot of references to update all content.

Also check the Content Repository child pages
(http://www.onehippo.org/cms7/documentation/development/content+repository/index.html)
Eg http://www.onehippo.org/cms7/documentation/development/content+repository/adding+a+field+or+type.html