[mkgmap-dev] Commit: r2045: Merge the index-memory branch.

Version 2045 was commited by steve on 2011-10-03 16:03:57 +0100 (Mon, 03 Oct 2011) Merge the index-memory branch. -Vastly improves the memory usage when creating and index. -If the index creation fails then the index output file is not written. Requires less than half the amount of memory than the old code, and it is quicker too as a nice side effect.