GitLab

added lines and rectangle as drawable; added shader by fixed color; used template for VertexBuffer; added icon for app

If only define triangle, it can display.
Both box and triangle have same pixel shader constant buffer.
Suspect conflict of pixel shader constant buffer.

IndexBuffer and VertexBuffer: 指定的格式与缓冲区大小不匹配

DO NOT use template programming in VertexBuffer