Added filter params to HomeController.Bugreports().
Fixed sequence empty exception when filtering returns no results.
Fixed hb-8 Implement exceptionType filter parameter

Added support for wildcards and multiple terms with comma separator.
Added LinqExtensions.cs and PredicateBuilder.cs.
Moved PredicateBuilder.cs into /Extensions.
Added .WhereLikeAny() extension to IQueryable.
Added support to only specify start or end date, no need to specify both.
Added support to filter by license key or owner name.