Implement receiver HID++ connect/disconnect events

Many changes were made here but that was the biggest one.

There's currently a bug where std::system_error: Broken pipe is thrown
after launching the daemon with a receiver connector.

A workaround for this bug is to simply shake the mouse while starting
the daemon. I will investigate this soon.

src/logid/Device.cpp

@@ -2,6 +2,7 @@
 #include "Device.h"
 
 using namespace logid;
+using namespace logid::backend;
 
 Device::Device(std::string path, backend::hidpp::DeviceIndex index) :
     _hidpp20 (path, index), _path (path), _index (index)
@@ -9,6 +10,13 @@ Device::Device(std::string path, backend::hidpp::DeviceIndex index) :
     log_printf(DEBUG, "logid::Device created on %s:%d", _path.c_str(), _index);
 }
 
+Device::Device(const std::shared_ptr<backend::raw::RawDevice>& raw_device,
+        hidpp::DeviceIndex index) : _hidpp20(raw_device, index), _path
+        (raw_device->hidrawPath()), _index (index)
+{
+    log_printf(DEBUG, "logid::Device created on %s:%d", _path.c_str(), _index);
+}
+
 void Device::sleep()
 {
     log_printf(INFO, "%s:%d fell asleep.", _path.c_str(), _index);