[Mnj] MAC PPC back up, first 31DEC09 patches

[Eric Greisen]

Two things of note:

Our MAC PPC machine has been resurrected and the MACPPC areas brought up 
to date.  This involved both 31DEC09 and 31DEC10.  MACPPC owners should 
run MNJs on these versions.

Two patches were made:

1. IMEAN had a minor Fortran ``error'' which the MACPPC compiler would 
not swallow.  The 31DEC09 version was upgraded to fix this and to count 
the image pixels in double precision in case there are more than 2^31 - 
1 pixels in the data cube.

2. Bandpass application acquired an error probably on September 20, 
2009.  This error caused it to use all channels in computing the average 
amplitude correction to be used in adjusting the weights.  Bad 
calibrations at the edge channels can make this a very bad idea.  The 
code that causes all arrays but VLBA and EVN to use the central 75% was
reinstated.  This correction involves a lot of link edits - a MNJ is the 
best way to fix up your code.

Eric Greisen