Contribute section for readme
Structure of snippets
Update Catalog.md
Update Catalog.md
TOC in Readme
Merge remote-tracking branch 'origin/develop' into develop

* origin/develop:
  Update Catalog.md
  Update Catalog.md
TOC Links
TOC Links
Extract some category and product things from the pool
typo
Extract Core Namespace
Extract some things to catalog
Added new categories
Extract customer namespace
typo