Add edd_should_update_payment_status filter. Remove edd_should_complete_purchase filter
add missing payment_id param
Check if pasyment status is not revoked when undoing a purchase
Add discount code(s) to sales stats return for the API. closes #2059
Improve item prices in API
Improve item prices in API
Add PHP arg separator to system info. #2057
Add allow_url_fopen to system info. #2057
Remove edd_sanitize_amount() from helper  functions. It was causing amounts to be rounded too early. #2042
Use edd_get_option() in edd_sanitize_amount() and edd_format_amount()
Fix and improve price formatting / sanitation tests
Fix test_price_range()
Added some WordPress Coding Standard && Fix some PHPDoc.
wp_editor() no return any value.
mistake, sorry
No needed.
Merge pull request #2063 from KingYes/master

Added some WordPress Coding Standard && Fix some PHPDoc.
Changelog and version bump for 1.9.6
Update .travis.yml