fix stackoverflow in calldataload, codecopy, extcodecopy + some tests
avoid code repetition in vm
minor fix
even less code
Merge remote-tracking branch 'upstream/develop' into newTests
Add exception in vm
Replacing old cstyle enums with c++11 enums in natspec
Merge pull request #566 from LefterisJP/natspec_cpp11_enums

Replacing old cstyle enums with c++11 enums in natspec
state log tests
fix stackoverflow in calldataload, codecopy, extcodecopy + some tests
avoid code repetition in vm
minor fix
even less code
Add exception in vm
avoid copy in vm
network: move static system-network functions into Network class. Further simplifaction of network lifecycle.
Merge branch 'develop' into network
cleanup
Merge pull request #568 from CJentzsch/newTests

fix vm overflow
Merge pull request #569 from ethereum/network

final poc7 network refactor