Refactor savefile loading framework into multipe shorter functions.
Add a rd_null() function for savefile blocks which aren't used anymore instead of duplicating that acros multiple functions.
Add description block in the savefile which is a one-line summary of the player
Remove ancient savefile loaders.
Add savefile_get_description()
Add savefile description support to main.c.
Merge pull request #221 from takkaria/cute-savefile

Savefile fixes:
* Refactor savefile code to make it cleaner and allow subsequent changes
* Add a 'description' block at the beginning of the savefile which describes the character in the savefile
* Remove ancient savefile loaders
* Modify main.c's -l argument so it displays the description along the savefile name