Failure if author name contains a space and device starts with a number

[elral]

When setting up a community device, the python script renaming.py should be used. This script asks for the device name and author name.

• If the device name starts with a number, comiling will fail. In C++ it is not allowed to name a class starting with a number.
• If the author name contains a space, the environments in the .ini file will also contain this space. This is also not supported.

Add both hints in the README.md file and extend the scipt to check valid formats for both, device name and author name.

[ccrawford]

Currently working on an updated version of the script with input checking, more information for the user, and some things that always bugged me (e.g. friendly name and Mobiflight_name longer than 16 characters).