How does it work in Bitshares? Who builds the blockchain and processes transaction if there is no mining? Is it possible to earn transactionfees by having  a transaction server running? Could someone please explain this in an easy way.

I am from Sweden I am new to Bitshares. I have some questions:

• Can I download a wallet for my laptop/mobilephone to send Bitshares to? Which wallet would you reccomend?
• Which manuals are there that could expain the bitshare concept for a person that knows nothing about it?
• Which possibilities are the in bitshares to get rewards from doing "mining" or from running server nodes that process transactions?
• How decentralised is the bitshare-network? Is there a small elite/company holding majority of bitshares and doing all the descisions or is it the opposite?

Thank you for any help.