Adding transaction fees to transaction class

This will add back the transaction fees. Prior to this commit the pool
had to cover the transaction fees. Now for each transaction the full
balance is transferred (RPC Daemon will remove the TX Fee) but two
transactions are added. One for the Debig and one TXFee.

Fixes #203.

**Requires database upgrade with supplied SQL file**
removed whitespace
Merge pull request #204 from TheSerapher/issue-203

Issue 203