Compile and warning fixes for Visual Studio 2013 and x64
Eliminate memory allocations from Dagger.eval.
Fig bug picked up by unreferenced formal param warning.
Projects, solution and fixes for Visual Studio 2013.
Disable warnings in unfinished class.
Fixed assert in test/main.cpp (using a .data() from temporary string after it was destroyed).
Tweak Dagger API to facilitate more complex mining.
Merge branch 'master' of https://github.com/programmerTim/cpp-ethereum into programmerTim-master

Conflicts:
	libethereum/BlockInfo.cpp
	libethereum/Trie.h
	test/main.cpp