cpp_headers: Renamed C++ headers from .h -> .hpp

To make room for UPM C and C++ sensor code to coexist, all UPM
C++ headers have been renamed from h -> hpp.  This commit contains
updates to documentation, includes, cmake collateral, examples, and
swig interface files.

    * Renamed all cxx/cpp header files which contain the string
    'copyright intel' from .h -> .hpp (if not already hpp).

    * Replaced all references to .h with .hpp in documentation,
    source files, cmake collateral, example code, and swig interface
    files.

    * Replaced cmake variable module_h with module_hpp.

    * Intentionally left upm.h since this file currently does not
    contain code (documentation only).

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

src/max5487/CMakeLists.txt

@@ -1,5 +1,5 @@
 set (libname "max5487")
 set (libdescription "Digital potentiometer")
 set (module_src ${libname}.cxx)
-set (module_h ${libname}.h)
+set (module_hpp ${libname}.hpp)
 upm_module_init()

src/max5487/javaupm_max5487.i

@@ -2,10 +2,10 @@
 %include "../upm.i"
 
 %{
-    #include "max5487.h"
+    #include "max5487.hpp"
 %}
 
-%include "max5487.h"
+%include "max5487.hpp"
 
 %pragma(java) jniclasscode=%{
     static {

src/max5487/jsupm_max5487.i

@@ -2,7 +2,7 @@
 %include "../upm.i"
 
 %{
-    #include "max5487.h"
+    #include "max5487.hpp"
 %}
 
-%include "max5487.h"
+%include "max5487.hpp"

src/max5487/max5487.cxx

@@ -27,7 +27,7 @@
 #include <stdlib.h>
 #include <stdexcept>
 
-#include "max5487.h"
+#include "max5487.hpp"
 
 using namespace upm;
 

src/max5487/pyupm_max5487.i

@@ -5,7 +5,7 @@
 
 %feature("autodoc", "3");
 
-%include "max5487.h"
+%include "max5487.hpp"
 %{
-    #include "max5487.h"
+    #include "max5487.hpp"
 %}