Finalize SDFormat 1.10 specification

[diegoferigo]

Refer to: SDFormat 1.10.

Adding new elements is fairly easy, we do accept pull requests.

sdf

• sdf/actor
• sdf/light

world

• world/audio
• world/wind
• world/include
• world/atmosphere
• world/gui
• world/light
• world/frame Add frames support #12
• world/actor
• world/plugin
• world/road
• world/spherical_coordinates
• world/state
• world/population

scene

• scene/sky
• scene/fog

state

• state

physics

• physics/dart
• physics/simbody
• physics/bullet
• physics/ode

light

• light

actor

• actor

model

• model/frame Add frames support #12
• model/plugin
• model/gripper

link

• link/velocity_decay
• link/sensor
• link/projector
• link/audio_sink
• link/audio_source
• link/battery
• link/light
• link/particle_emitter

sensor

• sensor

joint

• joint/gearbox_ratio
• joint/gearbox_reference_body
• joint/thread_pitch
• joint/axis2
• joint/physics
• joint/sensor

collision

• collision/laser_retro
• collision/max_contacts
• collision/surface

visual

• visual/cast_shadows
• visual/laser_retro
• visual/transparency
• visual/visibility_flags
• visual/meta
• visual/plugin

material

• material/shader
• material/render_order
• material/double_sided
• material/pbr

geometry

• geometry/empty
• geometry/heightmap/texture
• geometry/heightmap/blend
• geometry/heightmap/use_terrain_paging
• geometry/heightmap/sampling
• geometry/image
• geometry/mesh/submesh
• geometry/polyline

[diegoferigo]

After #34, we bumped the minimum supported specification to 1.10. Updating the title. The list might need to be updated, I didn't check thoroughly what are the differences between 1.7 and 1.10.