bitwise opertators

[ramagottfried]

would be nice to have the complete set of bitwise operators in odot expr lang.

one use case would be porting this type of thing to odot: http://countercomplex.blogspot.com/2011/10/algorithmic-symphonies-from-one-line-of.html

[maccallum]

We currently have bitand() and bitor(), so we should add bitnot() and bitxor(). We also want bitshifl() and bitshiftr(). My thinking at the moment is to emulate C and just provide an arithmetic left shift function, and a right shift function that does an arithmetic shift on signed ints and a logical shift on unsigned ints. No support for circular shifts...