remove obsolete cstack lint directive
add basic slice functions
add an initial `io` module
io: replace `File` with `StdStream` for now
add a deque module with a circular buffer
rm no-op `#[unsafe_no_drop_flag]` attribute
fix freestanding build
atomic reference counting
add a blocking concurrent queue
rm some needless abstraction
add a wrapped mutex/condvar to core::thread
add a blocking bounded queue
document the concurrent module
add `trylock` method to `Mutex`
concurrent: better documentation for BoundedQueue
add a `LockGuard` type for RAII mutex locks
standardize on a lifetime naming convention
add a priority queue
add concurrent priority queue containers
Adding Container trait along with implementation for strings and slices.