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/groveelectromagnet/groveelectromagnet.hpp

@@ -0,0 +1,77 @@
+/*
+ * Author: Zion Orent <sorent@ics.com>
+ * Copyright (c) 2015 Intel Corporation.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#pragma once
+
+#include <mraa/gpio.h>
+
+#define HIGH      1
+#define LOW       0
+
+namespace upm {
+  /**
+   * @brief Grove Electromagnet library
+   * @defgroup groveelectromagnet libupm-groveelectromagnet
+   * @ingroup seeed gpio electric
+   */
+
+  /**
+   * @library groveelectromagnet
+   * @sensor groveelectromagnet
+   * @comname Grove Electromagnet
+   * @type electric
+   * @man seeed
+   * @con gpio
+   *
+   * @brief API for the Grove Electromagnet
+   * 
+   * The Grove Electromagnet can hold up to 1 kg (approximately 2.2 lbs)
+   *
+   * @image html groveelectromagnet.jpg
+   * @snippet groveelectromagnet.cxx Interesting
+   */
+  class GroveElectromagnet {
+  public:
+    /**
+     * Grove Electromagnet constructor
+     *
+     * @param pin Digital pin to use
+     */
+    GroveElectromagnet(int pin);
+    /**
+     * Grove Electromagnet destructor
+     */
+    ~GroveElectromagnet();
+    /**
+     * Turns the magnet on
+     */
+     void on();
+    /**
+     * Turns the magnet off
+     */
+     void off();
+
+  private:
+        mraa_gpio_context m_gpio;
+	};
+}