Read EnOcean Chip ID and module version info

[henningkerstan]

The suggested change will add two (read-only) properties to the Communicator class:

• chip_id() which returns the modules chip id (if successful) and
• version_info() which returns the modules version info (if successful).

The version info is a new data structure, which is defined in the VersionInfo class in the file version_info.py.

The enocean_example.py file has been changed to also display the chip id.

In order for these changes it was necessary to slightly change the way, how the Communicator waits for the response packet also in the base_id() property.

[henningkerstan]

Hello @kipe, could you please have a quick look at this pull request? Thanks!