TRC hardfork @block 192239 / v0.8.0.2 (80002)

 - TRC build 0.8.0.2 (80002) is now the min_required build. p2pool won't
   start with an older TRC build.
 - TRC network IDENTIFIER & PREFIX values changed, so older nodes won't
   interfere anymore.
Merge pull request #133 from terracoin/trc_hardfork_80002

TRC hardfork @block 192239 / v0.8.0.2 (80002)