eth: simplify

MSVC/ring-daemon.vcxproj

MSVC/ring-daemon.vcxproj.filters

src/base64.cpp

src/base64.h

src/ringdht/eth/libdevcore/Assertions.h

src/ringdht/eth/libdevcore/Base64.cpp

src/ringdht/eth/libdevcore/Base64.h

src/ringdht/eth/libdevcore/Diff.h

src/ringdht/eth/libdevcore/Makefile.am

src/ringdht/eth/libdevcore/Terminal.h

src/ringdht/eth/libdevcore/UndefMacros.h

src/ringdht/eth/libdevcore/concurrent_queue.h

src/ringdht/eth/libdevcore/debugbreak.h

src/ringdht/eth/libdevcrypto/CryptoPP.cpp

src/ringdht/ringaccount.cpp

src/sip/sdp.cpp