doc: Scrubbed ALL sensor library descriptions

In an effort to clean-up and standardize UPM library
documentation, this commit updates (and in most cases,
unifies) the CMake description string AND CXX header
@comname string.

Strings were taken from datasheets when possible, spelling
mistakes were addressed, copy/paste errors where fixed,
Title Case was used, etc.

    * Tested/updated/added @web tags
    * Added/updated invalid sensor images
    * Added/updated @man tags, added missing manufacturers

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

src/grove/CMakeLists.txt

@@ -1,5 +1,5 @@
 set (libname "grove")
-set (libdescription "Grove module")
+set (libdescription "Grove Starter Kit Sensor Library")
 set (module_src grovebutton.cxx groveled.cxx grovelight.cxx groverelay.cxx groverotary.cxx groveslide.cxx grovetemp.cxx)
 set (module_hpp grovebutton.hpp groveled.hpp grovelight.hpp groverelay.hpp groverotary.hpp groveslide.hpp grovetemp.hpp grovebase.hpp grove.hpp)
 upm_module_init(mraa)

src/grove/grovebutton.hpp

@@ -35,7 +35,7 @@ namespace upm {
 /**
  * @library grove
  * @sensor grovebutton
- * @comname Grove Button
+ * @comname Button
  * @altname Grove Touch Sensor
  * @type button touch
  * @man seeed

src/grove/groveled.hpp

@@ -35,7 +35,7 @@ namespace upm {
 /**
  * @library grove
  * @sensor groveled
- * @comname Grove LED
+ * @comname LED
  * @type led
  * @man seeed
  * @con gpio

src/grove/grovelight.hpp

@@ -35,7 +35,7 @@ namespace upm {
 /**
  * @library grove
  * @sensor grovelight
- * @comname Grove Light Sensor
+ * @comname Light Sensor
  * @type light
  * @man seeed
  * @con analog

src/grove/groverelay.hpp

@@ -35,7 +35,7 @@ namespace upm {
 /**
  * @library grove
  * @sensor groverelay
- * @comname Grove Relay
+ * @comname Relay
  * @type relay
  * @man seeed
  * @con gpio

src/grove/groverotary.hpp

@@ -35,7 +35,7 @@ namespace upm {
 /**
  * @library grove
  * @sensor groverotary
- * @comname Grove Rotary Angle Sensor
+ * @comname Rotary Angle Sensor
  * @altname Rotary Potentiometer
  * @type ainput
  * @man seeed
@@ -50,7 +50,7 @@ namespace upm {
  * a set of functions to read the absolute pin value, degrees or radians, and another set
  * to do the same relative to the center of the knob's range.
  *
- * @image html groverotary.jpeg
+ * @image html rotaryencoder.jpg
  * @snippet groverotary.cxx Interesting
  */
 class GroveRotary: public Grove {

src/grove/groveslide.hpp

@@ -35,7 +35,7 @@ namespace upm {
 /**
  * @library grove
  * @sensor groveslide
- * @comname Grove Slide Potentiometer
+ * @comname Slide Potentiometer
  * @type ainput
  * @man seeed
  * @con analog
@@ -47,7 +47,7 @@ namespace upm {
  * Basic UPM module for the Grove slide potentiometer on analog that
  * returns either a raw value or a scaled voltage value.
  *
- * @image html groveslide.jpeg
+ * @image html slide.jpg
  * @snippet groveslide.cxx Interesting
  */
 class GroveSlide: public Grove {

src/grove/grovetemp.hpp

@@ -35,7 +35,7 @@ namespace upm {
 /**
  * @library grove
  * @sensor grovetemp
- * @comname Grove Temperature Sensor
+ * @comname Temperature Sensor
  * @type temp
  * @man seeed
  * @con analog