CI build tools

See merge request TheExperienceArchitects/Marte/marte-engine!3

We are now making build tools from the ci.
We discarded the debug builds because they were too big for the gitlab artifact system.

Builing windows tools with mingw fails, so tools are built only for linux.

Made python script unbuffered so we can see the output of the program live in the CI.

Add Gitlab continuos integration

See merge request TheExperienceArchitects/Marte/marte-engine!2

osx build is broken and deactivated

Congratulations to everyone in the Godot community for this awesome new
release, culmination of more than one year of development from close to
500 contributors!

Thanks to all involved, whether you contributed code, documentation,
bug reports, translations, community support or donations. You all
played a role in bringing better free and open source game development
tools to the world!

Godot 3.1 includes more than 7000 commits made since the 3.0 release in
January 2018, 3000 Pull Requests have been merged, and 3000 issues have
been fixed!

This release makes the 3.x branch more stable and powerful, and makes
it a very mature game development tool for both 2D and 3D.

Now feature development can restart towards 3.2 and 4.0!

Update changelog with recent additions

AudioStreamSample: Don't crash when writing to file fails

fix for access after free in OS_X11::set_context.

GLES2: Convert unsupported float texture types to 8-bit types

Fixed & improved Visual Studio custom debugger visualization

Add priority to gizmos and fix small issues

User defined gizmos will haave higher preference than editor gizmos by
default. Also fixed some inconsistencies in the gizmos menu when using
custom gizmos.

Do NOT use "[vertex]" in a comment...

Kids, don't try to learn OpenGL on a production branch right before
a stable release.

GLES2: Revert wrong extension checks from #26928 and #26932

To avoid reintroducing bugs as I did in #26928 and #26932.

texture2DLodEXT and textureCubeLodEXT are only for the fragment shader with
https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_shader_texture_lod.txt
In the vertex shader, texture2DLod and textureCubeLod are built-in.

This reverts commit f5f565e3.

This reverts commit 8c2d3815.

GLES2: Fix regression on texture2DLod extension checks

These can't be done after any non-preprocessor token.

GLES2: Ensure extension checks for texture2DLod

In canvas.glsl and scene.glsl, we were using texel2DFetch from stdlib.glsl,
which uses texture2DLod. In both cases, the stdlib.glsl include came before
the define of texture2DLod.

Might fix issues for drivers that don't support GL_EXT_shader_texture_lod.

HTML5: Fix ETC export for GLES2 fallback on mobile

Prevents a Null Reference in deleting Animations.

Increase size of radiance map in gles2

Fixes segfault on opening incompatible files in GDNative videodecoder.

A null Animation would cause a crash by accessing restricted memory.
Solved by checking if the animation track is null before using the
animation.

Fixes: #26829