Added logo to readme
Added logo to readme

Squashed commits:

* added logo license

* added logo design

* Delete license

* added logo design

* added logo-type

* Delete xNode-logotype2.png

* Delete xNode-logotype.png

* Delete xNode-logo-grayscale.png

* Delete xNode-logo-alternative.png

* Delete xNode-logo-alternative2.png

* Delete xNode-logo-50x50-grayscale.png

* Delete xNode-logo.svg

* Delete xNode-logo-50x50.png

* Delete xNode-logo-30x30_1.png

* Delete xNode-logo.png

* Update README.md

* Update README.md

* Update README.md

Siccity/UnityNodeEditorCore