Problem with Series.str.match
Not sure yet what's going on here. Doesn't appear to be a unicode issue

```
df = pandas.DataFrame([[u'A Confe\xdfion of the most auncient and true christen catholike olde belefe accordyng to the ordre of the .XII. Articles of our co[m]mon crede, set furthe in Englishe to the glory of almightye God, and to the confirmacion of Christes people in Christes catholike olde faith.']], columns=["title"])

df.title.str.match(".*[A|a]lmight")
# returns 
#0    ()
#Name: title

re.match(".*[A|a]lmight", df.title.ix[0])
# expected output
#<_sre.SRE_Match at 0x4fa8100>
```
