* adds the new API used for hashes/digests
* adds new crc & md modules using this API
* deprecate std.md5 & crc32
* update std.stream to use new hash API
This reverts commit d6c2ef0fb6.
These changes are valuable, but after further discussion, we've decided
to review how std.hash looks in general and redesign it, so getting
people to switch from crc32 to std.hash.crc32 will only mean that
they'll have to change their code _again_ once we've sorted out the
std.hash redesign, and we don't want that. So, I'm reverting these
changes for now, and they can become part of the std.hash redesign.
* More extensive unittests for nextUp.
Trivial tidying up:
* Changed all references to std.math.isXXX to the new names instead of the aliased old names.
* Moved license to end of std.math.
* Removed gcstats. Garbage collector statistics will be avaialable in durintime's 'memory' module.
* Removed object.d. This module is replaced by the object.d provided by druntime.
* Removed std.array. To trap an array bounds error, import 'exception' from druntime and catch ArrayBoundsException.
* Removed std.asserterror. To trap an asertion failure, import 'exception' from druntime and catch AssertException.
* Removed std.gc. To interact with the garbage collector, import 'memory' from druntime.
* Removed std.hiddenfunc. No equivalent exception is currently exposed by druntime, but if one is exposed it will be called HiddenFuncException and be declared in 'exception'.
* Removed std.moduleinit. druntime declares ModuleInfo in object.d, so it is implicitly availble without importing.
* Removed std.outofmemory. To trap an out of memory error, import 'exception' from druntime and catch OutOfMemoryException.
* Removed std.switcherr. To trap a switch error, import 'exception' from druntime and catch SwitchException.
* Removed std.synchro. This functionality will exist within druintime.
* Removed std.thread. A Thread class is available within druntime's 'thread' module. An interface comparison will be provided separately.
* Removed std.typeinfo. The classes defined in this package are for runtime use and should not be visible to the user.
The prior version of Phobos has been archived in tags/phobos-2.019 if needed.
