[ADD] contributing: Add TOC * Add a TOC (generated by ekalinin/github-markdown-toc) * ReadMe link required manual altering to use el id * `__openerp__.py` quoted * Pluralize issues
[ADD] contributing: Add TOC
* Add a TOC (generated by ekalinin/github-markdown-toc)
* ReadMe link required manual altering to use el id
* `__openerp__.py` quoted
* Pluralize issues

dreispt/maintainer-tools,vauxoo-dev/maintainer-tools,Yajo/maintainer-tools,acsone/maintainers-tools,dreispt/maintainer-tools,dreispt/maintainer-tools,acsone/maintainer-tools,acsone/maintainer-tools,vauxoo-dev/maintainer-tools,OCA/maintainer-tools,acsone/maintainers-tools,OCA/maintainer-tools,acsone/maintainers-tools,OCA/maintainer-tools,vauxoo-dev/maintainer-tools,OCA/maintainer-tools,Yajo/maintainer-tools,gurneyalex/maintainers-tools,Yajo/maintainer-tools,acsone/maintainer-tools,acsone/maintainer-tools,Yajo/maintainer-tools