memory: Hide all copy/assignment ops for class w/heap allocation

Many of the UPM libraries allocate space on the heap but do not
explicitly handle copying and assignment.  This commit uses C++11 delete
to forbit both the copy and assignment operator for these classes.

The C++ examples which used assignment operators to initialize class
instances were also updated since it did not appear necessary in those
cases to use the assignment operator.

Signed-off-by: Noel Eck <noel.eck@intel.com>

src/hlg150h/hlg150h.hpp

@@ -67,6 +67,10 @@ public:
    void setBrightness(int dutyPercent);
 
 private:
+   /* Disable implicit copy and assignment operators */
+   HLG150H(const HLG150H&) = delete;
+   HLG150H &operator=(const HLG150H&) = delete;
+
    mraa::Result status;
    bool isPoweredShadow;
    int pinRelay;