mipt-npm/kmath: 0.3.0-dev-18

Added ScaleOperations interface Field extends ScaleOperations Basic integration API Basic MPP distributions and samplers bindSymbolOrNull Blocking chains and Statistics Multiplatform integration Integration for any Field element Extended operations for ND4J fields Jupyter Notebook integration module (kmath-jupyter) @PerformancePitfall annotation to mark possibly slow API Unified architecture for Integration and Optimization using features. BigInt operation performance improvement and fixes by @zhelenskiy (#328) Integration between MST and Symja IExpr Complex power Separate methods for UInt, Int and Number powers. NaN safety. Tensorflow prototype Changed Exponential operations merged with hyperbolic functions Space is replaced by Group. Space is reserved for vector spaces. VectorSpace is now a vector space Buffer factories for primitives moved to MutableBuffer.Companion Rename NDStructure and NDAlgebra to StructureND and AlgebraND respectively Real -> Double DataSets are moved from functions to core Redesign advanced Chain API Redesign MST. Remove MstExpression. Move MST to core Separated benchmarks and examples Rewrite kmath-ejml without ejml-simple artifact, support sparse matrices Promote stability of kmath-ast and kmath-kotlingrad to EXPERIMENTAL. ColumnarData returns nullable column MST is made sealed interface Replace MST.Symbolic by Symbol, Symbol now implements MST Remove Any restriction on polynomials Add out variance to type parameters of StructureND and its implementations where possible Rename DifferentiableMstExpression to KotlingradExpression FeatureSet now accepts only Feature. It is possible to override keys and use interfaces. Use Symbol factory function instead of StringSymbol New discoverability pattern: .algebra. Adjusted commons-math API for linear solvers to match conventions. Buffer algebra does not require size anymore Operations -> Ops Default Buffer and ND algebras are now Ops and lack neutral elements (0, 1) as well as algebra-level shapes. Tensor algebra takes read-only structures as input and inherits AlgebraND Deprecated Specialized DoubleBufferAlgebra Removed Nearest in Domain. To be implemented in geometry package. Number multiplication and division in main Algebra chain contentEquals from Buffer. It moved to the companion. MSTExpression Expression algebra builders Complex and Quaternion no longer are elements. Second generic from DifferentiableExpression Algebra elements are completely removed. Use algebra contexts instead. Fixed Ring inherits RingOperations, not GroupOperations Univariate histogram fillin