Keepa

Added new field **categoryTree** to the product object.

**Added Product fields:**
author, binding, numberOfItems, numberOfPages, publicationDate, releaseDate, languages, ebayListingIds, lastEbayUpdate, lastRatingUpdate, coupon.

**Added Stats fields:**
outOfStockPercentage90

**Added Response fields:**
processingTimeInMs, tokensConsumed, additional

[Product] added Rent price type
[Product] added newPriceIsMAP boolean
[Product] added promotions
added lightningDealInfo to statistics
Category: Add highestRank and productCount fields

- added features, description, hazardousMaterialType to product object
- added lastUpdate to bestseller object
- added totalStorefrontAsins to seller object

- added product request methods for product codes
- added shutdown method to KeepaAPI
- fixed topseller request
- added asin-only parameter to search request

The following request did not work when the stats parameter was used:
<code>getProductRequest(final AmazonLocale domainId, Integer stats, Integer offers, int update, boolean history, final String... asins)</code>