Remove Boost Dependency - Devices

All devices no longer need boost (use signals and slots instead), other
than SRM.

src/Device.cpp

@@ -17,6 +17,7 @@
  */
 
 #include "Device.h"
+#include "assert.h"
 
 typedef QMap<QString,DevicesPtr> DevicesMap;
 
@@ -39,7 +40,6 @@ Device::~Device()
 bool
 Device::preview( QString &err )
 {
-    (void) statusCallback;
     (void) err;
 
     return true;
@@ -60,6 +60,12 @@ Device::cleanup( QString &err )
     return false;
 }
 
+void
+Device::cancelled()
+{
+    m_Cancelled = true;
+}
+
 
 QList<QString>
 Devices::typeNames()