Updated stage 2 proposal #245: Indexing changes

Changes instances of <indexterm-base> to <index-base>.

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Best,
Kris

Kristen James Eberlein
Chair, OASIS DITA Technical Committee
Principal consultant, Eberlein Consulting
www.eberleinconsulting.com
+1 919 622-1501; kriseberlein (skype)