* Changed order of filters in collection handlers (member items go first, all items last)
* Fixed global file_macro and image_macro methods
* Reactivated Images.Default
* Added Layout.value_macro to allow per request definitions of variables for the CSS stylesheet (still experimental)
* Finally removed PropertyMgr (replaced by Metadata)
* Renamed a bunch of collections, mountpoints and variables
* Reduced commentsMode options to "enabled" and "disabled" in Site prototype
* Renamed "shared" mode to "restricted" in Site prototype
* Moved a lot of stuff into the compatibility module
* Re-enabled calendar by switching to jala.Date.Calendar
* Removed obsolete calendar skins
* Re-enabled story archive by replacing Day prototype with new Archive prototype
* Moved story collections from Site to Stories prototype
* Enabled second option by default in HopObject.checkbox_macro
* Removed debugging code from Members/login.skin and User.js
* Replaced remaining occurrences of res.handlers.context with res.handlers.site
* Moved sites back from Root.sites to Root._children collection
* Moved Site.loginstatus_macro to Membership.status_macro
* Delegated rendering of story list in main.skin to archive
* Replaced Site.renderStorylist with Site.stories_macro
* Removed redundant Site.getMembership (see User.getMembership)
* Removed (currently) obsolete indexing methods
* Fixed some minor issues lately introduced
* Added handleMetadata method to define getters and setters for metadata properties
* Reduced and renamed value() method to map()
* Renamed most of the sys_* properties
