Bug fix for Solr Python bindings

[James Brady <ja...@gmail.com>]

Hi,
Currently, the solr.py Python binding casts all key and value  
arguments blindly to strings. The following changes deal with Unicode  
properly and respect multi-valued parameters passed in as lists:

131a132,142
 >   def __makeField(self, lst, f, v):
 >       if not isinstance(f, basestring):
 >         f = str(f)
 >       if not isinstance(v, basestring):
 >         v = str(v)
 >       lst.append('<field name="')
 >       lst.append(self.escapeKey(f))
 >       lst.append('">')
 >       lst.append(self.escapeVal(v))
 >       lst.append('</field>')
 >
143,147c154,158
<       lst.append('<field name="')
<       lst.append(self.escapeKey(str(f)))
<       lst.append('">')
<       lst.append(self.escapeVal(str(v)))
<       lst.append('</field>')
---
 >       if isinstance(v, list): # multi-valued
 >         for value in v:
 >           self.__makeField(lst, f, value)
 >       else:
 >         self.__makeField(lst, f, v)

James