build: osx: attempt to work with homebrew keg-only packages
Merge pull request #115

e2274c5 build: osx: attempt to work with homebrew keg-only packages (Cory Fields)
Don't split the g factor when not using endomorphism
Merge pull request #116

665775b Don't split the g factor when not using endomorphism (Pieter Wuille)
Add bounds checking to field element setters
Fix secp256k1_num_set_bin handling of 0