multi-search package release

Just released a new version of the multi-search Weka package.
A user requested the ability to supply a test set, rather than using cross-validation. Depending on the data domain, e.g., in case of timestamp-ordered transactions, cross-validation is not suitable. With this release, you can now specify test sets separately for the initial and subsequent sub-space evaluations, giving you the most flexibility (e.g., small test set for initial evaluation and then larger test set for more in-depth tests of sub-spaces).