Wi-Fi & BLE scanning

This release does not introduce any breaking changes

Instead, it comes with two new big features:

• Nearby Wi-Fi AP scanning (i.e., Wi-Fi fingerprinting)
• Nearby BLE devices scanning

Using the new features is completely optional and should not affect any existing apps. Please, carefully read the updated install instructions in case you want to incorporate this features to new or existing apps.

What's Changed

• Support for Wi-Fi scanning (a.k.a. Wi-Fi fingerprinting) by @agonper in #36
• Support for BLE scanning by @agonper in #37

Full Changelog: v4.0.0...v4.1.0