Explicit matching of player names

About the only place where we are guaranteed to get all the players'
names correctly is in the seating plan in the hand header. We extract
the names and build a regex that matches only the names. We only do this
if the current regex is out of date, to avoid recompiling them too
often.
I also did away with self.rexx because it seemed unnecessary and was
difficult to work with.

pyfpdb/fpdb_import.py

@@ -218,6 +218,10 @@ class Importer:
             conv.processFile()
             if(conv.getStatus()):
                 (stored, duplicates, partial, errors, ttime) = self.import_fpdb_file(conv.getProcessedFile(), site)
+            else:
+                # conversion didn't work
+                # TODO: appropriate response?
+                return (0, 0, 0, 1, 0)
 
         #This will barf if conv.getStatus != True
         return (stored, duplicates, partial, errors, ttime)