Shade MSV dependency

[cowtowncoder]

Due to issues with maintenance (lack thereof) of MSV, and especially challenges in Java module definitions that stem from it, it would make sense to simply shade MSV contents into Woodstox. While this does mean that size of Woodstox jar will more than double (alas), it is probably a reasonable trade-off: Woodstox is not typically used on resource-limited systems (like android) anyway, and jar size even with additions will not be unusually big (above 1 meg, yes, but smaller than f.ex Guava, similar to jackson-databind).