add section about becomming a contributor

add git workflow and license paragraphs

state ressource PPSP as wip

added committers workflow
Update CONTRIBUTE.md

corrected typos.
docs: add erlang template for new files
build: add targets for (dist)clean and commit
docs: update, wrap to 80 chars, indent, add tests and indentation
docs: CONTRIBUTING.md gives pull reqs a useful link