Linux area code and associated test was making assumptions about a NUMA
bitmask always being contiguous, which is not necessarily the case on
complex topologies.

[ci] create a readthedocs environment

See merge request !90

Better tracking of the issue.

Use gitlab environment to keep track of doc building on the gitlab side.
Allow for staging on the readthedocs trigger to allow devs to checkout
the docs outside of master.

Remove unused and unsafe dist rule.

[doc/fix] doxygen typo

See merge request !89

in/out is not valid doxygen.

Improve CI with respect to documentation

See merge request !88

Add a configure option for building docs, and create a CI job that will
always run to validate it. Note that make install-data doesn't need
source builds, so the environment can be quite small.

This patch also fixes the uncovered issues, and make doc build fail on
warnings.

Tweak the language in the documentation

See merge request !84

Padded Tilings

See merge request !87

The new padded tilings uncovered bugs in the operator table and the
implementation of padded layouts in row-major. We've seen these issues
before, we should be a bit more careful in the future.

Continue the work of merging the new tilings API, now with padded
tilings.

[ci] rely on git to list repoquality files

See merge request !85

Instead of tracking by hand the list of files that should pass
repoquality, just use git. This should ensure that we don't miss new
files, or forget to update the repoquality listing when new files are
added.

[ci/style] activate stylecheck on unit tests

See merge request !83

Quite a few changes needed.

Merge new version of tilings

See merge request !82

The new tilings are a massive change compared to the current
benchmarking code. It is time we disable them and reimplement most of
them using the new APIs. This will happen in another MR.

Also removes va_args from the public API.

Refactor the tilings to become generic to N dimensions, and interfacing
with the newly added layouts.

The main idea for this version of tilings is to provide an index into a
partitioning of a source layout into sub-layouts of smaller sizes.

Fix bugs triggered by inconsistent argument order in layouts, and the
wrong native function being called when in row-major.

[feature] add padded layouts

See merge request !80

Merge of padded layouts implementation from @videau, which provides a
way to extend a layout in any dimension by using a neutral element.

[feature] extend dma to support custom operators

See merge request !79

Some operators will need an extra argument (like transforms).

Change the DMA generic API to allow for a custom function pointer to
perform a specific request. Requires us to change a bit the underlying
management structures.

[feature] add area options on mmap

See merge request !78

## Change area mmap interface to include implementation specific options.

### Summary of changes in mmap interface
Previous mmap interface was:
```
int aml_area_mmap(struct aml_area *area, void*ptr, size_t size);
```
First, in this interface, the purpose of ptr is fuzzy as it is implementation specific and neither
the user nor aml generic interface knows what to do with it in a generic way.
Second, this interface does not allow for extensive options. In particular, linux mmap allow
multiple arguments that cannot be elegantly passed with this interface.
Instead we aml_mmap replace with this new interface:
```
int aml_area_mmap(struct aml_area *area, size_t size, struct aml_area_options *options);
```
Where the last field clearly state it is used for options and can always be NULL so that it can explicitly be used without knowledge of options implementation.

Area cuda

See merge request !76

New area allow to allocate data on cuda devices.
Allocation optionally include the ability to map
host memory on device memory. See cuda area
documentation.

Includes libtool helper to link cuda device object files
with the remaining of the library.

An additional error code has been added to aml errors for handling busy cuda devices
Also, all CI stages as been set not to run on branches name starting with wip.

Remove dma va args

Closes #49

See merge request !77

Now that only one type of request is allowed (layouts), remove va_args
for the DMA API, making it significantly cleaner.

Fix #49.

Remove support for direct pointers in a DMA request, with the goal to
remove va_args in the entire DMA API soon. As scratchs still work with
pointers, also modify scratchs to convert tiles in layouts.

This reverts commit 04315e6e.

Not needed since vector doesn't contain the actual inner type.

Improve speed and exhaustiveness of the unit tests.

See merge request !74

Various fixes related to dma API, missing validation on arguments,
pthread management and so on.

Unit tests were missing a few corner cases on dense_create. In
particular, there was a bug in the handling of the NULL pitch.

The bitmap tests were slowing down the entire pipeline, while at the
same time missing important checks on the inputs. This version is a bit
more exhaustive, while also speeding up the test by only checking the
corner-cases (first bits, last bits, partial ranges, overlapping
ranges).

Fix vector resize issue on async requests

Closes #48

See merge request !75