Modified requirements.txt and tests. #6346

1. tryton-sale-shop requirement modified. Needed, otherwise trytond
3.4.0 was being installed as dependency.
2. Made context a keyword argument in test transactions.
3. Fixed authorize.net issues.
Merge pull request #75 from PritishC/requirements-hotfix

Modified requirements.txt. #6346
Merge pull request #76 from PritishC/feature/task-6282

Modified recent orders to show upto previous 3 months. #6282
Notes now cannot be added to a cancelled order. #6283

Added small test for checkout.
Merge pull request #77 from PritishC/feature/task-6283

Notes now cannot be added to a cancelled order. #6283
Released version 3.2.0.8
Merge branch 'release/3.2.0.8' into develop
Added a method to return the amount to checkout #6364
Merge pull request #80 from aroraumang/feature/task-6364

Added a method to return the amount to checkout #6364
Released version 3.2.0.9
Merge branch 'release/3.2.0.9' into develop
Redesigned how orders page should look. #6282

Recent, Done, Cancelled and Old orders should be shown.