Standard `Debug` implementation for `[u8]` is comma separated list
of numbers. Since large amount of byte strings are in fact ASCII
strings or contain a lot of ASCII strings (e. g. HTTP), it is
convenient to print strings as ASCII when possible.
This change tracks the original capacity requested when `BytesMut` is
first created. This capacity is used when a `reserve` needs to allocate
due to the current view being too small. The newly allocated buffer will
be sized the same as the original allocation.
The previous implementation didn't factor in a single `Bytes` handle
being stored in an `Arc`. This new implementation correctly impelments
both `Bytes` and `BytesMut` such that both are `Sync`.
The rewrite also increases the number of bytes that can be stored
inline.
This commit is a significant overhaul of the library in an effort to head
towards a stable API. The rope implementation as well as a number of buffer
implementations have been removed from the library and will live at
https://github.com/carllerche/bytes-more while they incubate.
**Bytes / BytesMut**
`Bytes` is now an atomic ref counted byte slice. As it is contigous, it offers
a richer API than before.
`BytesMut` is a mutable variant. It is safe by ensuring that it is the only
handle to a given byte slice.
**AppendBuf -> ByteBuf**
`AppendBuf` has been replaced by `ByteBuf`. The API is not identical, but is
close enough to be considered a suitable replacement.
**Removed types**
The following types have been removed in favor of living in bytes-more
* RingBuf
* BlockBuf
* `Bytes` as a rope implementation
* ReadExt
* WriteExt
