[Halla12_software] longer endcup, field map and geometry update, SF7map_compare.C

[Zhiwen Zhao]

Hi, folks

To unify the PVDIS and SIDIS magnet design, as we have discussed, I have 
made the endcup of BaBar,CDF,CLEO 60cm longer than the previous version.
map grid size is enlarged for detailed study of field strength.

The design for ZUES hasn't been changed. We will evaluate it later.

The field map and solenoid geometry are updated in database, svn and the 
download area. Make sure you grab new files.

A field comparison utility call SF7map_compare.C is here
https://hallaweb.jlab.org/wiki/index.php/Magnetic_Field_Map

Cheers.

Zhiwen