Latest tests-related refactoring & improvments.
neth: show mining speed
save url in aleth
Merge pull request #223 from caktux/mining

neth: show mining speed
Merge pull request #224 from caktux/url

save url in aleth
Project refactor. Introduce the Serpent library.
Merge branch 'develop' of github.com:ethereum/cpp-ethereum into develop

* 'develop' of github.com:ethereum/cpp-ethereum:
  Project refactor. Introduce the Serpent library.
  save url in aleth
  neth: show mining speed
  Latest tests-related refactoring & improvments.