Galapix might have memory leaks

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Using Galapix for a while on large image collections results in its memory 
usage going up into the hundreds of megabyte. It's not clear if this is an 
actual memory leak or memory used for caching by sqlite or another artifact.

Either way, this needs further investigation, as there is no reason for Galapix 
to use anything close to that amount. In the best case, it should not need much 
for then what is necessary for the current tiles on the screen.

Original issue reported on code.google.com by [email protected] on 26 Aug 2011 at 10:17