Change entity fields fromDate and toDate

[pschild]

Field types should be split into day: number, month: number, year: number

[pschild]

Created_After and Created_Before. The actual semantics being "created on or after" and "created on or before"
see https://softwareengineering.stackexchange.com/a/194380

[pschild]

title	example	afterDate	beforeDate
Specific day	1960-05-12	1960-05-12	1960-05-12
Specific month	1960-08	1960-08-01	1960-08-31
Specific year	1960	1960-01-01	1960-01-31
Specific day range	2018-09-01 to 2018-09-10	2018-09-01	2018-09-10
Specific month range	2018-07 to 2018-09	2018-07-01	2018-09-30
Specific year range	2016 to 2018	2016-01-01	2018-12-31