Revision 1754521

Introduce name-based methods for access to named ranges in a workbook, and deprecate the old index-based methods.

Re-organise internally to use a map so that lookup is O(1) rather than O(n ranges).

Add a dependency on commons collections 4, also ASL licensed so no problem.

https://bz.apache.org/bugzilla/show_bug.cgi?id=59734