v_13: Remove dependency on pycryptodome

Added @svedi's code to verify RSA signatures

v_12: Fix Helpers.GetMachineCode() on Mac

This release includes a fix for Helpers.GetMachineCode() on Mac. Two problems were solved:

• In Python 3, there is no need to decode the string again (to utf-8). Fixes #15.
• In both Python 2 & 3, the machine code was not returned from the method.

v_11: Fix behaviour of Deactivate and CreateTrialKey when an API error has occured

Previously, Deactivate and CreateTrialKey would not notice an API error since "result" parameter was an integer but the library treated it as an integer.

This is now fixed to in this release. Moreover, we have added an additional check in case the result parameter is not present at all (for rare 500 errors).

Thanks to @tgamauf (#12) and @mhantke.

v_10: Fix machine codes on Mac

Fixes issue #11 .

v_09: Add Deactivate

Add deactivate

v_08: Create trial key (#10)

* Start on CreateTrialKey

* Update input parameters

* Update docs

* Update setup.py

v_07

Fix error handling and update version number

v_05

• Allow specifying how old a license file signature can be
• Add support for floating licenses

v_04: Add GetMachineCode method (#5)

* Add GetMachineCode method

* Add IsOnRightMachine method

* Update package info

* Update docs

v_03: Add support for saving and loading licenses as a string (#4)

* Add support for saving and loading licenses as a string

* Update examples