Tidy the interface and headers in DaisychainBMS

Fix the daisychainbms.h headers to match what is
required to define the class. Remove the catch all
stm32_vcu.h from daisychainbms.cpp.

Update the interface of DaisychainBMS to explicitly
override parent methods.

include/daisychainbms.h

@@ -19,15 +19,18 @@
 
 #ifndef DAISYCHAINBMS_H
 #define DAISYCHAINBMS_H
+
+#include "bms.h"
+#include "canhardware.h"
 #include <stdint.h>
 
 class DaisychainBMS: public BMS
 {
    public:
-      virtual void SetCanInterface(CanHardware* c);
-      void DecodeCAN(int id, uint8_t * data);
-      float MaxChargeCurrent();
-      void Task100Ms();
+      void SetCanInterface(CanHardware* c) override;
+      void DecodeCAN(int id, uint8_t * data) override;
+      float MaxChargeCurrent() override;
+      void Task100Ms() override;
    private:
       bool BMSDataValid();
       bool ChargeAllowed();

src/daisychainbms.cpp

@@ -17,8 +17,8 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include "daisychainbms.h"
 #include <math.h>
-#include "stm32_vcu.h"
 
 /*
  * This module receives messages from catphish's DaisychainBMS and updates