Gitian fixes mostly for Windows compilation

this PR allows a successful gitian build on windows, though the result looks a little strange...

if you don't want to compile the dependencies yourself, you can download them here:
https://earthcoin.s3.amazonaws.com/deps/bitcoin-deps-0.0.4.zip
https://earthcoin.s3.amazonaws.com/deps/boost-win32-1.49.0-gitian2.zip
https://earthcoin.s3.amazonaws.com/deps/qt-win32-4.7.4-gitian.zip