Merge pull request #150 from arthurchui/master

QueryBuilder supports DateTime, Time and Date value
Add class ref to time activity model
Better handling of IN queries.

Now you can pass an array of values to the query builder when specifying an "IN" operator. Automatically escapses quotes and puts it in the correct format.
Merge pull request #155 from markrickert/query-in

Better handling of IN queries in the query builder.
Update estimate.rb

Fixed txn_tax_detail, added :as => TransactionTaxDetail so that it is parsed correctly.
Merge pull request #156 from walter4dev/patch-1

Update estimate.rb
Merge pull request #153 from jabr/add-class-to-time-activity

Add class ref to time activity model
Add Payment entity to batch request and response.
Added definition of entity type