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/led/CMakeLists.txt

@@ -1,5 +1,5 @@
 upm_mixed_module_init (NAME led
-    DESCRIPTION "LED module"
+    DESCRIPTION "Light-emitting Diode (LED)"
     C_HDR led.h
     C_SRC led.c
     CPP_HDR led.hpp

src/led/led.hpp

@@ -40,7 +40,7 @@ namespace upm {
 /**
  * @library ledlib
  * @sensor led
- * @comname LED
+ * @comname Light-emitting Diode (LED)
  * @altname Grove LED
  * @type led
  * @man seeed