Reciprocal space

Added function to nsls2/recip.py taken parts from the pyspec 

def process_to_q - This will procees the given images (certain scan) of
    the full set into receiprocal(Q) space, (Qx, Qy, Qz, I)
def process_grid  -This function will process the set of
    (Qx, Qy, Qz, I) values and grid the data
def get-grid_mesh - This function returns the X,Y, Z co-ordinates of the grid as 3d arrays
Yes this is the place where istack calls. This function is mainly converted every pixel into reciprocal space. Final array is Nx4 array with h,k,l and Intensity. If we want to change we have to change Stuart's c-code. Which I don't want to change. like I told you(to Tom) early.