- Added `TaskHandle` as a non-generic reference to `Task`.
- Use array to initialize executor with tasks, avoiding macro.
- Wrap `Executor` and `Scheduler` in handlers requiring pinned
  references. This way we don't need unsafe when calling from the
  handler.
- Removed async timer task to avoid having N + 1 tasks.
- Moved timer wake logic into interrupt handler.
- Use UnsafeCell for interior mutability in priority queue
- Added special handling when popping root from heap of size 1 to
  avoid swapping item with itself.
- Use `UnsafeCell` for timer counter.
- Use UnsafeCell and raw pointers in executor to keep miri happy.
- Added macro to create static executor.
- Cleaned up memory leaks in test code
- Moved macro tests to integration test
- Removed dependency on atomig
- Disable std feature for crossbeam-utils
- Removed dependency on log
- Removed timer from executor
- Used fugit instead of embedded time
- Replaced raw pointer with pinned pointer in `ExecutorHandle`
- Added systick tick-less timer
- Use build script to allow memory.x in crate root
- Added std timer
- Added std example
- Task takes future instead of function
- Moved type alias to inne module to make compiler happy
- Moved priority queue into hyperloop crate and fixed loom test
- Added `nightly` and `macros` features
- Added changelog
- Added license
- Automated readme