Update `npm` for node 0.8 compatibility in travis.

Change-Id: Ib4014271df8d9046ecc559626b6fe2858f30f9ea
Equations are flush left by default.

It seems like the `bidi` package Does The Right Thing with the fleqn
document option (that is, moves the equations to be flush right).

Bug: 68838
Change-Id: I40a306168c454d88adefb263ae6483851eac5ce5