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Make the list scheduler a set of helper functions, instead of a complex
design with a set of callbacks.
Simplified list scheduler code.

Most uses in the backend should be mode_is_data() the few remaining uses
can compare with mode_b explicitely.

All users of NEW_ARR_A used it to construct a simple array, yet noone
cared about it actually being an array with a length field in front. For
this simple use case you should use ALLOCAN.

Due to the bug, the opcode name of phi nodes are never printed in the
first dump of the backend (...-begin.vcg).

As they were just a single flag the name should reflect that. I did not
change arch_irn_flags_none, as that is not about a single flag.

The new code has less options and variants, if you call irg_verify()
verification is performed, regardless of DEBUG_libfirm, or NDEBUG being
set and regardless of firm verification setting switches. On the other
side no atomic dump and abort is performed anymore, the call has to do
this, though an irg_assert_verify() function has been added as a
convenience measure.
There has also been a complete rewrite of the actual checking performed.
The new code is simpler, should produce more consistent output and
can report more than one error.

the templates are now friendlier for usage outside of libfirm

It has been empty for nearly all systems. People who used to put stuff
in config.h can still create a config.h on their own and inject
-include (gcc) or /FI (msvc) into their CPPFLAGS.

They weren't used in a sensible way and their semantic for
non-arithmetic ops was unclear.
Also implicitely fixes a bunch of bugs where these where set but no op_index
was set at the same time.

Just state the copyright and the project the files belong to. You can
then find the COPYING file for the whole project.

Infer it from block.

Infer it from block.

That way the spill engine can rematerialize the loads and needs no
extra spills for these values.

The only user knwos, where its sp is.