Fixed several problems in kendo.js module + inMemory module + jay data model binder

[ysmoradi]

1. Ability to call toQueryable method on empty array by passing type to that as a parameter.
   type will be an optional parameter, if not passed, it will be detected from first item of array as like as before. So this is not a breaking change.
   I've added an exception in case when no type is provided and array itself is empty.
2. Better jayData filter creation from kendo data source filter. Now it supports ignoreCase, and filters like this will work{logic: 'or' , filters: [{field:'FirstName' , op: 'eq' , value: 'A'} ,{field:'FirstName' , op: 'eq' , value: 'B'} ] }
3. if (di === null){return null} was developed after usages of "di". I've moved that code to top.

Thanks in advance