KDE Pattern recognition +docs

document for corotational algorithm of structural mechanics

Various finite difference modeling, migration, and inversion applications, parallelization over loops and tasks, and other features described in the package docs.

Codes related with tutorial: *Data modeling: deep belief networks*. Getting Started - Presentation - https://docs.google.com/presentation/d/1wZ8Mx6q3H-gwZh-lJWBQFPUmuhSZWwNp5QYxLBW4v5U- Codes related with tutorial: *Data modeling: deep be