a smarter library of finite elements

Version of Firedrake used in 'A domain-specific language for the static condensation and hybridization of finite element methods'.

This release is specifically created to document the version of
Firedrake used in a particular set of experiments. Please do not cite
this as a general source for Firedrake or any of its
dependencies. Instead, refer to
http://www.firedrakeproject.org/publications.html