* renamed pmlist_t -> alpm_list_t
* made alpm_list_t a public type (alpm_list.h header)
* removed additional storage for registered DBs in pacman source
* some code cleanup
* removed duplicate (pm)list_display functions from pacman source
* misc code cleanup
* libalpm api changes - move from a _getinfo(p, WHAT_WE_WANT) scheme to a
typesafe _get_what_we_want(p) scheme [not 100% complete yet]
* some const correctness changes
* removal of PM_* types in alpm.h in favor of the pm*_t types used throughout
libalpm
* 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
