Rewrite of stats gathering data structures
Rewrite of stats gathering data structures

 - switch from multiple obscure arrays to named tuples
 - added a p() method, which computes percentages (and accomodates for 0
   data points): this greatly simplifies the print code
 - reworked a number of the euchre stats, so that euchre % are computed
   against the makes of the same unit: ie. if we're showing the % of
   euchres against a team, we compute is a % of the makes of that team,
   not the overall makes, etc
 - track orderers and callers in detail, although so far we're not printing
   any data relevant to them
 - don't track hole card euchres if the orderer is also the dealer (since
   it (marginally) obfuscates the stats)

Thump/peuchre