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This removes the strange entity/type duality and we get rid of union symconst_symbol.

The new design simply lets you specify hex or not in tarval_snprintf.
This is way simpler than the previous machinery and enough for all users in
libfirm.

It is not usefull for optimization in most languages:
- In C/C++ you can't really change the value of enum constants as casting
  from/to integer has to produce the expected results.
- In Java (and other OO languages) enum members are objects so the
  libfirm enumeration type can't be used there anyway

We do not model them as a type anymore, but simply annotate
compound_member entities with a bit offset and bit size.

I don't really understand what it was supposed to do (because nodes
using/producing should be pretty much immovable anyway because of their
dependencies, so an additional pinning type appears unnecessary).
In practice there was no code differentiating between mem_pinned and exc_pinned.

They are considered low level operations now which just allocate/free a
block of memory on the stack. There is no highlevel typeinformation
attached anymore or support for heap allocation. Frontends/liboo should
provide their custom highlevel nodes if they need these features.

Templates are put in separate files now, making the main script more
generic in nature

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.

The builtin can be used to generate fast code for unsigned division by constant.

Code generation is supported for the IA32 and the SPARC backend.
Since our ARM backend currently has no Add with Carry instruction,
the builtin is currently not supported on Arm.
The same holds for the AMD64 backend, which does not support a division yet.

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

Accordingly remove repr_class from entities.

A comments starts with '#'.

- do not record properties on irgs anymore, always do it on the irgs
  entity; entity properties have to be a superset of the entities method
  type properties.
- Remove special irg_inline_property and use mtp_additional_properties
  instead

You can still attach NoMem if no memory input is present.
This makes it more consistent with the Call node and fixes failing
get_ASM_mem in case of no memory input.

This commit removes the strange differentiation between
ir_visibility_external and ir_visibility_default. We now only have
ir_visibility_external for all symbols visible across compilation units.
You may or may not attach graphs/initializers to them.