Windows RT work

[bdares]

The code now compiles in Visual Studio 2013 and Windows 8.1

Some issues such as UTF-8 BOM breaking the XML parser and the Windows XML parser strictly applying rules to attribute namespaces have been (somewhat) addressed. We added a hack to libzip's zip_fread to break it out of the read loop because sometimes it wouldn't end. (We didn't track down the root cause of this issue.)

The VSIX installer also works.

[danielweck]

Note that UTF-8 BOM handling was added in the ReadiumSDK, but it only works with libxml (not in the case of #if EPUB_USE(WIN_XML)). See manifest.cpp, and io.h/cpp https://github.com/readium/readium-sdk/commit/b1e9a90d5d7788f40df4a7911faac2be76796fc1

[danielweck]

Note that there is an ongoing effort to remove unused async-bytestream code, please check the feature branch diff:

https://github.com/readium/readium-sdk/compare/develop...feature/asyncRemoval

[rkwright]

Note that this may be moot if we decide to abandon the desktop applications in favor of a Chrome or Cordova-based solution. So we need to decide that first.