Docs: Subgraph Isomorphism (uxlfoundation#2000) (uxlfoundation#2008)

Added documentation on subgraph isomorphism algorithm.

Update docs markup (uxlfoundation#1813) (uxlfoundation#1897)

Required changes in CMake files (uxlfoundation#1731)

[rls] Additional Flags for Linker in CMake (uxlfoundation#1495)

* Additional flags for linker in CMake

* fix

* fix

[DOC] Updated readme and contributing files (bp uxlfoundation#1284) (u…

…xlfoundation#1294)

* [DOC] Updated readme and contributing files (uxlfoundation#1284)

* Updated readme and contributing files

(cherry picked from commit 6a64398)

# Conflicts:
#	README.md

* Update README.md

Fix merge conflicts in README

* Added pics for README

Co-authored-by: Ekaterina Mekhnetsova <outoftardis@users.noreply.github.com>
Co-authored-by: Ekaterina Mekhnetsova <mekkatya@gmail.com>

[2020-u3-rls] Fix class voting for kNN (uxlfoundation#962)

* Fix class voting for kNN

* Fix kNN kdtree examples

fix one-algorithm build and spicific prediction case after probabilit…

…y feature (uxlfoundation#177)

Merge pull request uxlfoundation#85 from dmitry741/dev/dmitrypa-sdl-e…

…rr-memory-handling

SDL: err-memory-handling

DAAL 2019 Update 4. Revision: 33235