misc fixes for edge cases

1) sets with only one package
2) packages with only one property
3) sets with only one property

remove some unused code

(trivial optimization)

add a missing comparison to ensure correct repo sorting

Split razor_package and razor_entry names into name and flags

split razor_property.name into name, flags, and type bitfields

Change list flags back to 8 bits instead of just 2

improve the list abstraction with "struct list_head" and "struct list"

both structs are actually just uint32_t's in disguise, using bitfields
to avoid the need for explicit bit operations, and using two type names
to hide the RAZOR_IMMEDIATE hack from the public API

Add a list abstraction for package/property lists

split array and hashtable code out into a new file