#14 Added stubs for search function with advanced filtering
#14 added methods to filter type
#14 Implemented behavior of filter types
#14 Added categories to participant filter
#14 renamed categories
#14 added camp filter
 #14 bounce build number
#14 wrote test for after filter
#14 wrote test for before filter
#14 wrote test for contains filter
#14 added text resources for filter types
#14 wrote test for ends-with filter type
#14 wrote test for equals filter type
build number bouncing
#14 wrote test for equals-ignore-case filter type
#14 wrote test for greater-than filter type
#14 wrote test for less-than filter type
#14 wrote test for not-equals filter type
#14 wrote test for not-equals (case-insensitive) filter type
#14 wrote test for starts-with filter type