Detect already escaped ampersands
Merge pull request #59 from assaydepot/fix_amp_regex

Detect already escaped ampersands
Depends on constant that is only in nokogiri 1.5+
Merge pull request #78 from danielfarrell/nokogiri-fix

Depends on constant that is only in nokogiri 1.5+
digest mismatch when it should not
Revised reproduction of the problem (signed just once)
Obliterate double-escaping; if this is necessary, the other side is doing something wrong
Merge remote-tracking branch 'upstream/master'