Allow for () characters in taxonomy that don't contain numbers

[mothur-westcott]

The taxonomy file contains taxons like:

FR682493.1.1461 D_0__Archaea;D_1__Marine Hydrothermal Vent Group(MHVG);D_2__uncultured archaeon;D_3__uncultured archaeon;D_4__uncultured archaeon;D_5__uncultured archaeon;D_6__uncultured archaeon;

Mothur expects confidence scores to be in-between the () characters. When it tries to convert MHVG to a number it crashes. You can fix this by changing the () characters to || characters.

FR682493.1.1461 D_0__Archaea;D_1__Marine Hydrothermal Vent Group|MHVG|;D_2__uncultured archaeon;D_3__uncultured archaeon;D_4__uncultured archaeon;D_5__uncultured archaeon;D_6__uncultured archaeon;