#35 Overrides for the addFilter method in SearchInfo

[Roberto Lo Giacco]

With the intention to support usage of SearchInfo I think a couple of additional method to add filters would be useful:

- addFilter(String column, int condition, Object[] values) // useful for dates, timestamps and stuff like this
- addFilter(String column, int condition, String[] values) // usefull if you have an array of string instead of one single separated list