Add Neutrino / ECF / Global Brain / GiveDirectly / Stanford references to guide/docs/community/business-development.md

[Ro5s]

^ Title. We should reference these prominent ecosystem efforts with a brief summary of their purpose, recent events, locations, etc.

See:

• https://www.neutrino-space.com/
• https://thebridge.jp/en/2017/12/global-brain-omise-to-launch-blockchain-focused-fund-co-working-space-network
• https://ecf.network/
• https://ethereumworldnews.com/ethereum-eth-foundation-omisego-stanford-univ-unveil-blockchain-research-center/
• https://blog.omisego.network/update-givedirectlys-findings-from-the-field-and-what-it-means-for-omisego-3f66b9b54e23

Also, it would be nice to eventually reference the various ecosystem events OmiseGO team has attended thus far, relevant presentations, etc.