Add more data sources from USPTO

[amotl]

Based on comments by @andyhegedus coming from #5, we would like to add support for accessing more data sources from USPTO in the future.

• BDSS API: https://bulkdata.uspto.gov/
• Bulk search and download API: https://developer.uspto.gov/api-catalog/bulk-search-and-download
• PatentsView API: https://developer.uspto.gov/api-catalog/patentsview

[mustberuss]

If it helps, the same people who created the patentview api also created a python wrapper for it. The api can output json or xml but the wrapper generates csv files. Wrapper queries can be chained together as mentioned on my patentsview site at http://patentsview.historicip.com/wrapper2.htm The site is similar to the peds one mentioned in #5.

Russ Allen