OPAC Browse: Replace English pager with customizable pager

OPAC Browse: Replace English pager with customizable pager

I have changed the way the formerly English-only paging shortcuts work.
There is no longer any need to customize config.tt2.  Instead, set the
org unit setting 'opac.browse.paging_shortcuts' to a string containing
all the characters that you want used in shortcut links, in order.

For English, you might use:

*0-9*ABCDEFGHIJKLMNOPQRSTUVWXYZ

Asterisks are used here to set off shortcuts that are more than one
character long.  Everything outside of asteriks is a one-character
shortcut.

Signed-off-by: Lebbeous Fogle-Weekley <lebbeous@esilibrary.com>