Update raspberry-pi.md
Update raspberry-pi.md

1.) Reorganized and reformatted some sections. 
2.) Added bitcoind and P2Pool optimization information, thank you gyverlb on bitcointalk.org for that documentation. 
3.) Modified vertcoin.conf maxconnections and limited P2Pool connections in an attempt to lower DOA % rate. Will continue testing this fix for success / progress. 
4.) Changed Unitus merged mining to experimental, this has proven to be unstable so far. 
5.) Added 'Failing to connect to peers' troubleshooting documentation, ran into this issue myself. I found copying the peers.dat file over from my Windows PC which synced the blockchain initially fixed the issue. Using bootstrap.dat is also a viable solution.
Bryangoodson/VertDocs,Bryangoodson/VertDocs,Bryangoodson/VertDocs,Bryangoodson/VertDocs