#10 Bulk import frame slow for many files

[Douglas Squirrel]

If you have many RecipeML files (say, over 50) in the
xml folder, the Bulk import frame opens very slowly.

[Mike Rosseel]

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Moreover, for a really large amount of files (I unzipped all
116 recipeml zip-files) an out of memory error occurs.

settings : linux, java 1.4.2, -Xms64Mb -Xmx128Mb or
-Xmx256Mb (I have 256Mb memory)