Add small stellar research doc

Author: robvanmieghem

research/stellar.md

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+# Stellar
+## concept
+All assets in stellar are credit, issued by anchors.
+
+When you hold assets in Stellar, you’re actually holding credit from a particular issuer that promises to return the real world value ( for example USD) when you return it.
+
+License wise, this might pose a problem
+
+## Distributed Exchange
+Assets are linked to the issuing Anchor. An order can only be executed if both buyer and seller have a trustline to the issuing party.
+
+Supports asset conversion up to 6 hops, but the whole payment is atomic.
+
+**Assets must be present as credit on the stellar network.** 
+This works perfectly if your assets only exist on the stellar network as credit or if users interact through centralized parties holding their assets( like bitcoin bank or traditional exchange).
+
+_Question is how a credit issuer that acts as an exchange for it's users can control/recuperate free floating real world assets like BTCor TFT that stay in control of the user._
+
+Fees are in XLM.
+## random thoughts
+
+Not completely decentralized,for example sending with kyc, requires knowledge and trust of the counterparty, also 
+Very good solution for traditional centralized banks that want to collaborate:
+https://www.stellar.org/wp-content/uploads/2016/08/Sending-Payment-Flow-Detailed.jpg
+
+However, the protocol includes who can hold assets: https://www.stellar.org/developers/guides/concepts/assets.html#controlling-asset-holders
+
+### Wallets
+A variety of wallets is available, each with their own features or focus, it makes it a bit hard though as a beginner.
+
+
+## Stellar Smart Contracts (SSC)
+Not as flexible as for example Ethereum but this might be a good thing.
+
+compositions of transactions that are connected and executed using various constraints:
+- Multisignature
+- Batching/Atomicity
+- Sequence
+- Time Bounds
+
+**Seems sufficient for crowdfunding** or other basic financial operations or agreements.
+
+## Ico's, crowdfunding, ...
+As mentioned above, the stellar platform is suited for for crowdfunding or other basic financial operations or agreements
+
+Possible options to issue credit:One needs to have trusted credit:
+- Already be on the stellar platform with trusted credit.
+- Accept fiat or cryptocurrencies directly and issue credit on the stellar platform
+
+We would have provide a small wallet if people do not already have one.
+
+
+