Windows swig build fails

After the solution dynet.sln gets built, there are still quite a few problems. After issue #1426 gets fixed, the next problem seems to be with this line from CMakeLists.txt.
```
COMMAND zip -j ${CMAKE_CURRENT_BINARY_DIR}/dynet_swigJNI_dylib.jar ${CMAKE_CURRENT_BINARY_DIR}/libdynet_swig.*
```
This will not catch the file dynet_swig.dll. That can be fixed by removing "lib" and perhaps adding Debug/.

That is not the last of the problems, though.

Really, has this been built for Windows in the recent past? Judging from the instructions, see below, see above, it hasn't.

Start with dynet.sln and the relevant CMakeLists.txt command that packages libdynet_swig.* into dynet_swigJNI_dylib.jar. Review issue #1426 first, then reproduce the Windows build to identify the remaining failures described in the issue. Done means the Windows solution and SWIG packaging complete successfully.

Written by the indexing model from the issue text.