Fix (hopefully) library dependency resolution.

Installing libs is now enabled, hardcoded.
Enable -Wall for all builds.
Fix many warnings and latent bugs.

depends/settings/include/keyring.h

@@ -33,6 +33,11 @@
 class LIBSETTINGS_EXPORT Keyring
 {
 public:
+	/**
+	 * @brief virtual dtor
+	 */
+	virtual ~Keyring() {};
+
 	/**
 	 * @brief the System Keyring instance
 	 * @return the Keyring instance