cmake can now build to linux and windows. Use -DTARGET_PLATFORM=<linux|w64>
Fixes for spurious unknown parent blocks.
Merge pull request #39 from CodeShark/cmake_merge

cmake can now build to linux and windows. Use -DTARGET_PLATFORM=<linux|w64>
Merge branch 'master' of github.com:ethereum/cpp-ethereum
CMake build fixes.
Minor Windows fix.
BMore accurate system description.
Bump version.