* Furthered the "lazy caching" to force the pkgcache to read nothing
(INFRQ_NONE) by default. Anything requiring package data should now check
the infolevel of each package and attempt to update it. This could be
ironed out a bit more later (by using the front-end get_info function
* Switched to libfetch. Drastic changes to the download code and the callback
progress bar functions. Also fixed the return value of
_alpm_downloadfiles_forreal. Downloading now supports http, ftp, https, and
files urls, along with 'mtime's and numerous other fancy features from
libfetch.
* Removed the PMList typedef, in favor of the same naming scheme other
structs use 'pmlist_t'
* Added a time stamp on debug output, to make it more informational
* Moved alpm_db_register to _alpm_db_register, making the public function
not take a callback parameter
