1.0.0: One Point Oh

After being used in production at @altmetric for a while now and having been six years since its first release, it's time for re2 1.0.0.

The only notable change from 0.7.0 is support for recent versions of the underlying re2 library which require C++11 support.

The gem still supports older versions of re2 but any attempt to compile newer versions will require a compiler with appropriate language support (e.g. clang 3.4 on Ubuntu 12.04).