General-purpose library for typical low-level operations

A library for: - rbtree with key-value pair extension - deques (double-ended queues) (Stacks (LIFO) / Queues (FIFOs)) - platform independent opendir-style directory access - platform independent dlopen-style shared library access - auto-storage strings with direct access - command line option (argv) parser - shconfig-style config file parser - platform independent random number generator with transparent /dev/urandom support - various string, memory and zvec ops