Filtered text search up and running (finally)
-Merged the previous SearchParams children classes into one: TextSearchParams, that will perform both kinds of search we had before.
-Modified the factory to create an object of the new TextSearchParams. I'm keeping the factory just in case we need some other kinds of search (probably we'll do)
Merged with PR #25 changes.
Merge pull request #35 from mdebenito/fullsearch

Fullsearch