Merge pull request #42 from whereisciao/include-crud-in-base-service

Include crud in base service
SalesReceipt.ship_method_ref is a simple String and not a BaseReference. Closes #45
Dont set Item#rate_percent under the hood

This can cause unexpected results. For example: the Item#unit_price
would not persist in quickbooks as expected because the gem would send a
request with RatePercent: 0.0. That would affect the unit_price setting
it to nothing (0)

Not 100% sure on this but I believe all BigDecimal attributes could take
advantage of this to_xml_big_decimal method introduced here
Use to_xml_big_decimal for other Item attributes
Merge pull request #46 from huoxito/item-unit-price

Dont set Item#rate_percent under the hood
Added support for tax details on invoices
Removing manual requires by deferring invoice require
Add time activity service and model.
Merge pull request #47 from harvesthq/invoice-tax

Add full support for TxnTaxDetail to Invoice
Merge pull request #48 from joejwright/master

Add time activity service and model.
Updated README to reflect new implemented entities
Implemented AccessToken endpoint for OAuth token management: renewal and disconnect. Closes #50
Use respons.plain_body in AccessToken Service
Merge pull request #51 from pavelpachkovskij/master

Use response.plain_body in AccessToken Service
0.0.7 release
fix BillPayment REST_RESOURCE
fix PaymentMethod, PurchaseOrder, VendorCredit REST_RESOURCE path
Was using incorrect REST endpoint for PurchaseOrder. Fixes #53
Release
Merge pull request #52 from pavelpachkovskij/master

fix invalid REST_RESOURCE path