Notes for ASUM

1. Performs $asum \leftarrow \vert\vert re( x ) \vert\vert _ {1} + \vert\vert im( x ) \vert\vert _ {1}$
2. An index file input line looks like:

   <ID> <incX> <source file> <author name>
   

3. For complex, if both vectors have unit stride, the real routine is called with 2*N.