Proposal: refactor template grammer & canvas ux

[tuoxiansp]

• Unlike now all components(mould) were tiled on canvas, there will be only one component were editing on canvas.
• Besides the mould that will be exported as React component, all kits of this mould will be tiled on canvas too.
• States will no longer be the concept of mould, but associated with kit.
• Kits will be allowed to access inputs directly.

[tuoxiansp]

Seems like we can make the list part much simpler by infer scopes automatically from the component tree.

[tuoxiansp]

Seems like we can make the list part much simpler by infer scopes automatically from the component tree.

will update version.2 next week, should resolve the list expression problem.