adding pypirc to .gitignore

Merge pull request Vonage#167 from Vonage/namespace-change

Namespace Change

Merge pull request Vonage#163 from Vonage/v251-patch

2.5.2 Patch

Bump version: 2.3.0 → 2.4.0

Bump version: 2.2.0 → 2.3.0

Bump version: 2.1.0 → 2.2.0

Update changelog.

Merge branch '2.0-release'

Merge branch 'develop'

Bump version to 1.4.0