Clean old process seeds

[dgarrett]

We need to clean out old process seeds each time the proc file is written to and seeded.
Look into proc source, also:
struct list_head tasks; (in each task_struct, a linked list of all tasks)
extern struct task_struct init_task; (init's task struct is statically allocated and should be able to be used from anywhere)
http://linuxgazette.net/133/saha.html