Add required headings feature for issues

Changelog for 0.10.8:

• PR #169 Add required issue headings by @alexellis

Commits
f6f0141 Disable feature for maintainers by @alexellis
53d5691 Add required issue headings by @alexellis
d82e7ec Update GET instructions order by @alexellis
817b0d8 Update instructions for onboarding by @alexellis
9afdcbc Update SaaS instructions and local development by @alexellis
e1e9c79 Update .CUSTOMERS by @alexellis
39d4eb7 Update README.md by @alexellis
1621fa2 Update paying customers by @alexellis
8421f56 Update customers with paying users by @alexellis
0fe4056 Update cost by @alexellis

Generated by Derek