XML diff and merge

Current version

php54-xmldiff requires the following formula to be installed:
autoconf 2.69 Automatic configure script builder

Recent formula history

Andreas Braun Add description for xmldiff formula
Andy Blyler php54-xmldiff: convert from sha1 to sha256
Andy Blyler fix style issues
Andy Blyler Update URLs to use HTTPS
Jack Nagel Move abstract classes out of Formula directory

Formula code at GitHub