[cmake] fix capitalization of some SuiteSparse_ variables

There were still some variables with the old capitalization SUITESPARSE_
that prevented my own code from finding umfpack.h.

After this small fix, the code from merge request !8 works for me as expected.

See merge request !13

There were still some variables with the old capitalization SUITESPARSE_
that prevented my own code from finding umfpack.h.

Feature/typelist

This adds `template<class...T> struct TypeList {};`
together with some utilities. It's e.g. used in the
concept checking facility that I'll add soon.

Besides this it can be used to 'store' an argument pack and access
its members. In contrast to a `std::tuple<T...>` which is
a container of objects of types `T...` a `TypeList<T...>`
only captures the types themselves . Hence one can easily
create TypeList objects and use them to pass types around
or, e.g., in overload resolution where they can be used for
tag-dispatch.

Notice that adding a template `packer<T...>` doing exactly
the same has been proposed for the standard in [N4115][].
But in my opinion TypeList is a more instructive name.

[N4115]: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4115.html

See merge request !7

Feature/fs1702 cmake add suitesparse support rebased

I had to fix Sphinx and tested it with the LDL branch from dune-istl.
Tested by Tobias and Marco, thanks!

See merge request !8

Thanks Dominic for the hint!

Otherwise the test could mark SuiteSparse as not found which
would break the search for other SuiteSparse libraries.

* Fix capitalization of SUITESPARSE_INCLUDE_DIRS
* Drop PATHS when searching SuiteSparse_config.h in default paths
* Add variable dereferencing in string(TOLOWER
* Set SuiteSparse_${_component}_FOUND only TRUE if actually found
* Mark more variables as advanced

According to the naming convention the variables which are
used outside must have the same capitalization as the Find*
module.
Previsously we used SUITESPARSE_*.

FindPackageHandleStandardArgs provides everthing we need.

If BLAS is not found, the whole configure process is
aborted. We actually want that BLAS is a requirement
for SuiteSparse. It is better to check using
FindPackageHandleStandardArgs.

The naming scheme is kind of broken.

Adjust code to reflect comment.

Tobias Malkmus authored 9 years ago and Christoph Grüninger committed 9 years ago

This patch adds the cmake findpackage script which locates Tim Davis' SuiteSparsae collection.

If a certain setting of the SuiteSparse library should be used it can be found using
find_package( SuiteSparse COMPONENETS <list-of-components> )
with a specific list of components.
Existence of components can be check using the SUITESPARSE_<comp>_FOUND/HAVE_SUITESPARSE_<comp> cmake variable.

The UMFPack search routines are redirected to the more general FindSuiteSparse script.

We may drop the 'links' section in favour of just linking those pages
in the text.

We should always export ::Type and ::type to follow
the dune convention and the std pattern for type traits.

Deprecate dune/common/alignment.hh

alignment.hh provides Dune::AlignmentOf<T>::value which is identical to std::alignment_of<T>::value.
This merge request replaces use of AlignmentOf with the shorter alignof() operator introduced in C++11 and deprecates the header.

See merge request !6

This can be used to 'store' an argument pack and access
its members. In contrast to a std::tuple<T...> which is
a container of objects of types T... a TypeList<T...>
only captures the types T... . Hence one can easily
create TypeList objects and use them to pass types around
or. e.g., in overload resolution where they can be used for
tag-dispatch.

This class is e.g. used in the concept checking facility
I'll add soon.

Notice that adding a template packer<T...> doing exactly
the same has been proposed for the standard in N4115

  http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4115.html

This is intended to contain everything related to type
computations, like, e.g., type traits, helpers for
overload resolution, ...

GitLab readable contribution guide, license and README

Adding the `.md` extension enables rendering of the files, which is much nicer.

Also ported the contribution guide from the User Wiki.

Renamed COPYING to LICENSE.md because that is the name that GitLab looks for to display it nicely on the project starting page.

If this one is accepted, I will do the same for the other core modules.

See merge request !5

The alignof() operator was introduced in C++11.