Blender Git Loki

Call gpencil engine from draw_manager

Create storage and small fixes

Merge branch 'blender2.8' into greasepencil-object

Register gpencil engine in draw manager

Fix typo error

When build shaders the linker fails due an error in glsl datatoc name

Only draw strokes if active object is grease pencil

Replace GL_FLOAT

Merge branch 'blender2.8' into greasepencil-object

Replace VertexFormat_add_attrib types to new values

Merge branch 'blender2.8' into greasepencil-object

First steps to create new drawing mode for gpencil

Created basic structure of the drawing mode, but pending of adding all functionality and link to draw manager.

Change function name after rename of Gawain function

Merge branch 'blender2.8' into greasepencil-object

Free new symbol memory

I forget include the memory free in previous commit

Merge branch 'blender2.8' into greasepencil-object

Add new draw manager symbol for new ob_gpencil object type

Include class registration for scene GP panel

After the last changes in the classes registration, need add the class to the the list.

Include ModelViewProjection matrix to use in the future

This will be used to calculate the stroke thickness

Cleanup code

Remove unused ARegion parameter

This parameter was added for new shaders, but finally is not used.