Update to README for XenoCoin

There are many crypto currencies being developed now.  XenoCoin is an idea to create a currency that would work as a micro currency or penny-to-dollar or "copper" to litecoin "silver" or bitcoin "gold".

It would have XenoCoin using scrypt as a proof-of-work algorithm.
 - 5 minute block targets - (twice as long as litecoin)
 - subsidy halves in 550k blocks (~52 years)
 - ~1.1 billion total coins

Different from Bitcoin.
 - 100 coins per block

Same as Bitcoin:
 - 2016 blocks to retarget difficulty

New Feature - XenoCoin is for basic science research funding using single lowest fraction of transactions - a micro-xeno - to be sent to MetaSciens nonprofit on every trade or transaction.
When enough currency is built up - a transparent granting process will be set up to distribute money to basic research projects in medicine and other sciences.

The XenoCoin is designed to be useful for over a 100 years from the tiniest to the largest of purchases or transfers.