Rewrite
Fixed array query operators $length
Array update operators $addToSet: copy the array before start pushing
Fixed array update operators $push & $unshift
Fixed SchemaArray checkRequired
Specify dev dependencies version number
Added 2 query operators for Number type: $within, $without
Modified date query operator $month
Fixed date query operator $ne
Added array compare to util
Schema Types: Added "compare" method
String schema type: Added query operator $not
Updated schema types
Added util
Added "save" method in schema type
Rewrite find. Added logical operators: $or, $and, $not, $nor
Rewrite update
Modified SchemaType checkRequired
Removed old test file. Updated utilities test.
Modified schema type query operators: $in, $nin, $without