Update Sum-It package to a much smaller version built in release mode.
Release HaikuWebkit 1.4.1.
Revert "Revert "DynamicBuffer: implement BDataIO""

This reverts commit 747b401e875f19d83508cc39176f4c263182c515.
DynamicBuffer: dos2unix
DynamicBuffer::Write(): Fix return type and semantics
DynamicBuffer::Read(): Small optimization (skip 0 case)
BNetBuffer: Restore semantics after DynamicBuffer -> BDataIO
Revert "Revert "HttpRequest: support gzip and deflate compression.""

This reverts commit 256080b112e417fc4fd2f3f9fcb23485e1b23b42.

With the following changes:
* Adjusted to the BZlibCompressionAlgorithm API.
* Add some error handling.
BUrl: Add missing functionality from support kit BUrl
Remove private support kit BUrl

Use the public BUrl from the network kit instead.
BZlibCompressionAlgorithm: Missing NULL check
BUrl::IsValid(): Replace with a slightly better dummy impl
Copy haikuports/FormatVersions onto the bootstrap image.

* Without it, haikuporter will believe there's a version mismatch
  between itself and the haikuports tree.
Use a specific packager for continuous integration builds.
Disable TLS support on x86_64 explicitly.

* Building gcc-4.8.3 on x86_64 with TLS support fails with an internal
  compiler error. Until that problem is fixed, don't use TLS on x86_64,
  which (due to libstdc++ compatibility) requires the same for the
  host cross compiler.
Corrected version of gcc_bootstrap to match the version in HaikuPorts recipe.

* There was a version mismatch between HaikuPorts gcc_bootstrap recipe
  and build/jam/repositories/HaikuPortsCross/arm which prevented
  building @bootstrap-raw for ARM. Thanks Ingo for helping out!
* Ditto for ppc, x86, x86_64.

Signed-off-by: Jérôme Duval <jerome.duval@gmail.com>
gcc_bootstrap: bump revision.