mxcl/homebrew — pull request #19241 by bwbuchanan (2013-04-16 15:48:29+00:00)
Title: pbc 0.5.13 and pbc-sig 0.0.8

Update pbc from 0.5.12 to 0.5.13. This fixes an incompatibility between pbc and clang.
Update pbc-sig from 0.0.7 to 0.0.8. This fixes a bug in signature generation.
Switch both packages from SHA1 hashes to SHA256.