[Couchdb Wiki] Update of "Views" by JanLehnardt

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The following page has been changed by JanLehnardt:
http://wiki.apache.org/couchdb/Views

The comment on the change is:
add note about all views being updated if one in the same design doc gets querie

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  For both kinds of views, the view is defined by a !JavaScript function that maps view keys to values (although it is possible to use other languages than !JavaScript by plugging in third-party view servers).
  
  Note that by default views are not created and updated when a document is saved, but rather, when it is accessed. As a result, the first access might take some time depending on the size of your data while CouchDB creates the view. If preferable the views can also be updated when a document is saved using an external script that calls the views when updates have been made. An example can be found here: RegeneratingViewsOnUpdate
+ 
+ Note that all views in a single design document get updated when one of the views in that design document gets queried. 
  
  Note on !JavaScript API change: Prior to Tue, 20 May 2008 (Subversion revision r658405) the function to emit a row to the map index, was named "map". It has now been changed to "emit".