Fix issue with FieldtypeDatetime keeping rows for empty values per @teppokoivula issue #284
Fix for @felixwahner issue #279 (uninitialized vars in PageRender::getCacheFile)
Attempt fix for CacheFile not getting deleted issue as reported by Pete.
Addition of some utility/convenience functions in the core, mostly applicable to WireArray. See the commit in file WireArray.php for detailed comments on the new additions.
Some additional tweaks to the WireArray API additions.
Fix issue #289 with overflow-y/auto issues. I think I'd rather just put up with the jumping menu when scrollbar appears, which isn't really much of a problem.
Attempt fix for issue #287 and issue #290