Version 0.5-2
-------------

* Added methods for "[[", "$", "[[<-", and "$<-" for filehash objects.
Only character indices are allowed

* filehash-DB functions use the new serialize() from R 2.4.0 so that
numeric data will not suffer from rounding error due to previous use
of serialize(ascii = TRUE).

* New format filehash-DB1 which stores the key index/map and data in a
  single file.

* New "filehash" method for lapply so that functions can be applied to
  database entries.


Version 0.4-1
-------------

* Patch release, changed some internals for the "DB" type databases

* Added test database for regression testing in future releases


Version 0.4
-----------

* Added name mangling scheme to prevent clobbering on case-insensitive
OSes like Windows (thanks to Bill Venables and David Brahm)

* Added dumpImage, dumpObjects, dumpDF functions for dumping various
things to filehash databases

* Added filehashOption() function for setting global options; right
now only the default database type can be set

* dbLoad and db2env are regular functions now rather than
generics/methods.  dbLoad's default 'env' is the parent frame now

* Added a "filehash" method for 'with'

* Added new generic dbUnlink which deletes a database from the disk
