Py-eodms-rapi

- Added user-agent info to request headers
- Added a logout function to end EODMS sessions

- Fixed issue 34
- Fixed issue 32
- Fixed issue 30

- Fixed error which occurs when getting field choices from RAPI (Issue 28)

- Added a "reset" method to reset the EODMSRAPI
- Added the ability to submit a search with values from the EODMS UI website (ex: for NAPL, "Free Digital Download $0 (TIFF)" can now be used).
- For RCM, added support for search field id: CATALOG_IMAGE.PUBLIC_GOOD

- Fixed the repeated downloading issue
- Fixed Special Handling Required issue 23

- Added functionality for ALOS-2 collection
- Added ability to continue downloading even if an image download crashes