Replace 1 tab with 4 spaces.
Fix config.xml for Unix systems (old version works only on Windows).
- Reorganize system configuration fields and set proper sort order.
- Encrypt "Secret Api Key" and "Public Api Key" fields.
Replace 'this' with 'self' for the static variable.
Add HTTP proxy support.
Add support for partial refunds.
Add dummy payment form template into adminhtml to suppress PHP warning on the order edit page.
Add debugging for request/response to/from payment gateway.
Merge pull request #1 from sergeykalenyuk/improvements

Improvements