MapIteratorResultSet update

Some more methods was implemented, because there is need in them.
IntegerFilter enhacement

Enhancement that allows to get int values from columns of another types
containing values compatible with int type.
EntityFilters

All available filters was collected into the EntityFilters class following the
sample of such classes in Guava. Obsolete filters was marked @Deprecated and
linked to new corresponding methods.
Merge pull request #2 from errandir/entitymapper

Entitymapper