Create LICENSE

1. Use Unreal Insight to trace performance.

Make UV0 the normalized length, and UV1 the pixel length.

Reimplement the render data builder referencing the LineBuilder in ElementBuilder.

Add method to get MID of line.

Update line render data in parallel.

Remove parallelism since it slows down the performance.

Remove hash calculation, use slate GI instead.

Fix the incorrect calculation of dynamic resolution and tangents.

Reimplement with separated interp cache and parallelism.

Add middle version that tries to compute the tangents like how GraphEditor works.

Refactor and add example widget.

Add interface to remove all lines.

Refactor AdvancedLineDrawer::LineBuilder::UpdateRenderData, use hash to determine whether to update or not.

Init first working version.