Update README.md

move RDFminer to Shape Generators, add icons to Shexer and RDFminer

Author: VladimirAlexiev

README.md

@@ -65,7 +65,6 @@ Software tools or libraries, sorted by programming language.
 
 ## Shape Discovery Tools and Collections
 
-- [RDFminer](https://github.com/Wimmics/RDFminer) - Discover SHACL shapes representative of an RDF data graph, by Wimmics; `CECILL-C` license; `Java`.
 - [SHACL Discovery Service](https://github.com/AKSW/discover-shacl-shapes) - Discovery service for SHACL shapes/shape groups; `MIT` license; `PHP`.
 - [Shapes of You index](https://index.semanticscience.org/) - SPARQL queries, OWL/SKOS vocabularies, SHACL/ShEx shapes, indexed from public `git` repositories; `MIT` license; `Typescript`, `Python`.
 - [SHACL Play! Catalog](https://shacl-play.sparna.fr/play/shapes-catalog) - To see your shapes listed here, add them in the [Shapes Catalog source file on Github](https://github.com/sparna-git/SHACL-Catalog/blob/master/shacl-catalog.ttl).
@@ -89,7 +88,8 @@ Also see [Polyglot Modeling](https://github.com/json-ld/yaml-ld/issues/19) tools
 - TNO [Semantic Treehouse](https://www.semantic-treehouse.nl/) - Has [SHACL input](https://www.semantic-treehouse.nl/docs/wizard/shacl-input) and [output](https://www.semantic-treehouse.nl/docs/wizard/shacl-output). Used as a Vocabulary Hub in dataspaces.
 - [TopQuadrant: OWL Axioms to SHACL Constraints](https://www.topquadrant.com/doc/latest/reference/Transform_ConvertOWLAxiomsToSHACLConstraints.html) - Commercial, closed-source solution 💰.
 - [Ontotext SOML](https://platform.ontotext.com/semantic-objects/soml/) - Input is YAML, output is GraphQL schema with querying and mutations, SHACL shapes for validation. Commercial, closed-source 💰.
-- [sheXer](https://github.com/weso/shexer/) - Library to extract ShEx/SHACL shapes from RDF data, SPARQL endpoints, or rdflib graphs. It offers iterative parsing and/or sampling to deal with big datasets; `Apache` License; `Python`.
+- [sheXer](https://github.com/weso/shexer) <img alt="GitHub last commit" src="https://img.shields.io/github/last-commit/weso/shexer" align="top"> - Library to extract ShEx/SHACL shapes from RDF data, SPARQL endpoints, or rdflib graphs. It offers iterative parsing and/or sampling to deal with big datasets; `Apache` License; `Python`. See ([publication](https://doi.org/10.1016/j.knosys.2021.107975), [projects using it](https://github.com/weso/shexer/network/dependents?dependents_before=MTUzNjIwMTg0MTA))
+- [RDFminer](https://github.com/Wimmics/RDFminer) <img alt="GitHub last commit" src="https://img.shields.io/github/last-commit/Wimmics/RDFminer" align="top"> - Discover SHACL shapes representative of an RDF data graph, by Wimmics; `CECILL-C` license; `Java`.
 
 ## Shape-based Query Generators