Wow! That is what I have to say regarding Broadway Sacramento's opening night performance of the current national tour of "West Side Story."  The sold out house at the Community Center Theater suggests others agree. While it is beautifully staged, with wonderful singing anddance, and good acting, it is the material that is the star here. The powerful music of Leonard Bernstein coupled with the equally powerfully words of Stephen Sondheim are enough to make "West Side Story" a show worth seeing. Add in the choreography of original "West Side Story" director and choreographer Jerome Robbins, which can move from strongly ballet to strongly modern dance in a moment, and it's hard to beat. A