Merge pull request hellosign#73 from radhack/issue-66

Issue 66

Merge pull request hellosign#72 from radhack/master

Update to 4.0.8

Update to 4.0.7

Merge pull request hellosign#65 from HelloFax/issue-64

Reset parameters, even if exception is thrown.

Update to v4.0.5

Bump version to 4.0.4

Bump version to 4.0.3

Bump to version 4.0.2

Bump version to 4.0.1

Merge pull request hellosign#34 from HelloFax/issue-13

Refactor HTTP client and update automated tests.