General policy drafts

[Matt Caswell]

The OTC have previously created policies for how voting and policy 
updates should occur.

The policies are here:

https://github.com/openssl/technical-policies/blob/master/policies/voting-procedure.md
https://github.com/openssl/technical-policies/blob/master/policies/policy-change-process.md

I've now created PRs for equivalent policies for the OMC. You can see 
the draft PRs here:

https://github.com/openssl/general-policies/pull/1
https://github.com/openssl/general-policies/pull/2


Matt