lost entries in trunk/lecene/CHANGES.txt

[Doron Cohen]

Hi, seems some entries were lost when committing LUCENE-4585 (Spatial
PrefixTree based Strategies).
http://svn.apache.org/viewvc/lucene/dev/trunk/lucene/CHANGES.txt?r1=1418005&r2=1418006&pathrev=1418006&view=diff
I think I'll just add them back...
Doron