added --verbose option to show piece info bars
added --verbose option to show piece info bars

closes #296

jamesliu96/webtorrent,adriagalin/webtorrent,rozifus/webtorrent,whitef0x0/webtorrent,akiva/webtorrent,madmarks/webtorrent,joshterrill/webtorrent,loon3/webtorrent,fisch0920/webtorrent,madmarks/webtorrent,Stiveknx/webtorrent,ericwooley/webtorrent,ericwooley/webtorrent,FabianFrancoRoldan/webtorrent,lucamaraschi/webtorrent,LinusU/webtorrent,beni55/webtorrent,dan-hill/webtorrent,serafinfernandez/webtorrent,solderzzc/webtorrent,nicola/webtorrent,joshterrill/webtorrent,MiracleBlue/webtorrent,yciabaud/webtorrent,lucamaraschi/webtorrent,karissa/webtorrent,yciabaud/webtorrent,sideffect0/webtorrent,sideffect0/webtorrent,ngjermundshaug/webtorrent,serafinfernandez/webtorrent,webtorrent/webtorrent,feross/webtorrent,ngjermundshaug/webtorrent,arestov/webtorrent,fisch0920/webtorrent,karissa/webtorrent,rozifus/webtorrent,jamesliu96/webtorrent,feross/webtorrent,akiva/webtorrent,dan-hill/webtorrent,webtorrent/webtorrent,gillesdemey/webtorrent,whitef0x0/webtorrent,FabianFrancoRoldan/webtorrent,beni55/webtorrent,MiracleBlue/webtorrent,Stiveknx/webtorrent,rom1504/webtorrent,gillesdemey/webtorrent,solderzzc/webtorrent,adriagalin/webtorrent,nicola/webtorrent,LinusU/webtorrent,loon3/webtorrent