Windows support

[cetygamer]

Issue

Windows path uses Unicode characters, thus boost::filesystem::path is actually wchat_t string. That way functions that expect ASCII strings produce errors while compiling.

Solution

Always get ASCII string from boost::filesystem::path variables.

Closes #10

[cetygamer]

@tatref, I've added build instruction for Windows here, you can check them out.

[cebix]

Thanks for your contribution (which I seem to have overlooked)!
I think one can pass the path objects directly to the fstream constructors. Can you confirm this?

[cebix]

Resolved by 0f1ff12 and 9a75119