Added makedirs function to sipsimple.util

Ignore-this: 440569b5fa9a9ff49bd6ca2013221ed4

darcs-hash:20090325123320-1e3d8-75c31331c3609ea5ef110f394aa7394d481b0763
Removed DataDirectory and DataFile configuration datatypes

Ignore-this: 3cd1fbdcf83e95430da7c91e4396ad95

darcs-hash:20090325124755-1e3d8-9adb572d09aad91609bd4fb8c07741e78438a316