Reserve names on crates.io

[bvssvni]

I think we should start to reserve the names on crates.io, but development will continue with git dependencies. We can create branches "crates.io" for every project.

It might be that some external dependencies are not on in the registry. In that case we have to deal with those cases in isolation.

• 2D libraries should be prefixed with "piston2d-" #713
• 3D libraries like "gfx_voxel" should be prefixed with "piston3d-"
• Libraries used for both 2D and 3D, like "texture" and "gfx_texture" should be prefixed with "piston-"
• Core libraries should be prefixed with "pistoncore-" #712
• Libraries with generic names that depend on the core libraries should be prefixed "piston-"
• Libraries with names like Conrod does not need a prefix
• Libraries that are freestanding like "vecmath" does not need a prefix
• If the names are reserved and it does follow any of rules above, then it can be prefixed with "piston-", or a suitable prefix can be discussed

The idea is that people will know the difference between which libraries they need for window, which they can use for 2D and 3D, and which libraries that are part of Piston ecosystem in general.

Todo:

• Rename package (if necessary)
• Add meta data to the Cargo.toml
• Publish projects that has no dependencies
• Publish the projects that can be published
• Solve the remaining issues

[bvssvni]

• current
• pistoncore-event_loop
• pistoncore-event
• pistoncore-input
• pistoncore-window
• pistoncore-sdl2_window
• piston-texture
• piston-gfx_texture
• piston-ai_behavior
• piston2d-drag_controller
• piston2d-graphics
• piston2d-opengl_graphics
• piston2d-sprite
• piston3d-cam
• piston3d-gfx_voxel
• shader_version
• vecmath
• fps_counter
• read_color
• select_color
• freetype-rs
• freetype-sys
• texture_packer
• pistoncore-glfw_window
• piston2d-gfx_graphics

[bvssvni]

Done.