Did you download the FreeOrion Win32 SDK
from sourceforge, or just check out the source alone? The SDK has the various required dependencies, such as boost, in the locations expected by the solution file you opened. You can also locate or compile all the dependencies yourself, but this is not really necessary unless you're having a problem with one of the precompiled ones in the SDK.
The solution file you opened should have had GiGi projects in it as well. Did they build successfully before the errors you quoted, or did you just build the freeorion project? You need to build the whole solution, so that the GiGi libraries get built first, as these are needed to build FreeOrion itself.
glew is, I believe, the (Open) GL Extention Wrangler, a library used on Windows for OpenGL coding.