Restore structure to targets lost during nonrecursive refactor.
Merge pull request #115 from pmienk/develop

Restore structure to targets lost during nonrecursive refactor.
Update nuget secp256k1 dependency version.
Merge pull request #121 from evoskuil/develop

Update nuget secp256k1 dependency version.
Allow tests and their dependencies to be optionally included with --with-tests configuration parameter.
Merge pull request #122 from pmienk/develop

Make tests a configuration parameter
Update OSX and other installation instructions.