Merge pull request #44 from paypal/stable

Merge pull request #43 from paypal/rel-1.0.1
Support Invoice APIs
Invoicing support
Correct path for invoicing
update tests with correct endpoint
Merge branch 'invoicing'

Add invoicing rest api features to sdk
Update invoice endpoint
Added invoice samples
Merge pull request #45 from paypal/support-invoice-apis

Support Invoice APIs
Update README with invoicing samples
Correct syntac for invoices_tests
Fix fonts on readme
Merge branch 'rel-1.1.0' into stable

Merge in release branch for 1.1.0
Merge branch 'stable'

Merge in stable branch, 1.1.0 release
Merge pull request #46 from paypal/stable

Stable
Add mobile backend example for a merchant using paypal sdk
Merge branch 'merchant_backend_sample'

Merge in mobile backend example
Merge branch 'master' into stable

Merge in mobile backend example
Merge branch 'master' of github.com:paypal/rest-api-sdk-python

Pull in upstream changes
remove CHANGELOG in favour of release_notes.md