Initial Ixcoin 0.9.2.1 client build updates...

Initial commit to bring in the Ixcoin logo/icon/png files so it looks like the 0.8.6 version, fixed the UnitOfMeasure enumeration so it reads uIXC,mIXC & IXC coin everywhere.  Major rework of the linearize.py (contrib) to run under Python 3 and set to build the bootstrap.dat for our blockchain, only requires your RPC username.password in the config file to run with the daemon on the ixcoin port.  References everywhere to bitcoin ports for main&test nets, changed to reflect Ixcoin's.  

Big problem solved for now in this commit is a way to bypass the Blockchain damage in April 2013, 8 blocks have exceptions added to the verifychain console command when run at checklevel's 3 & 4 to pass testing.  See Main.cpp in the DisconnectBlock() method.  There will need to be discussion about this, but for now its a workaround solution.
 
Throughout the code made minor cosmetic changes, things like the build date will be whatever you make it on, references to an ixcoin wiki, which we don't have (yet), changed to bitcoin wiki, for now.  The starting year for the coin should be 2011, not 2009  which was for bitcoin, fixed those in places needed to show up in your builds.