Changes:
- All log entry calls have been commented out. They are kept for
  documentation purposes when extending the implementation, but will
  ultimately be removed; this library will not operate with logs.
- Enums no longes derive Serialize/Deserialize. It was not immediately
  obvious which crate was responsible for this feature.

The stm32f401re seems only emit these sync packets. This implementation
suffices for target-dependent debugging.

LocalTimestamp2 contain all needed information in the header. No need to
be refactored.

This will be useful if any manual intervention must be done.

Upon an error like this, it may be necessary to manually decode the
data.

There is no subsequent processing that need be done after an overflow.

When I started writing this library I extracted the internal decoder
from probe-rs with the intention of refactoring it. Instead I ended up
rewriting the decoder from scratch. The current code base contains only
original code (when compared to the probe-rs implementation).

From experiments with an stm32f401re, the ARM specification may not be
followed in practise. Whe the decoder returns an error, it may thus be
necessary to manually (outside of the crate) inspect the incoming bytes
and eventually modify them to handle any possible target-specific
bitstreams which diverge from the spec. So instead of figuring out a
decent API for this intervention, we'll just make the internal state of
the decoder public.

Input is a bitstream which may eventually break the original 8-bit
alignment. Using a [u8] would then mean bookkeeping how much we diverge
from this alignment and appropriately process incoming bits, which adds
needless compexity for such an edge case. Using a BitVec keeps code easy
to read.

rust-embedded/cortex-m#363 and
rust-embedded/cortex-m#342 have been merged.

This commit can later be reverted if the crate is readopted into the WG.

This commit can later be reverted if the crate is readopted into the WG.

Closes #1.

Closes #2.

Makes it trivial to store the iterator in an isolated struct if needed
C.f. cargo-rtic-scope.