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/sx6119/CMakeLists.txt

@@ -1,5 +1,5 @@
 set (libname "sx6119")
-set (libdescription "Grove FM receiver")
+set (libdescription "FM Receiver")
 set (module_src ${libname}.cxx)
 set (module_hpp ${libname}.hpp)
 upm_module_init(mraa)

src/sx6119/sx6119.hpp

@@ -37,10 +37,11 @@ namespace upm {
     /**
      * @sensor sx6119
      * @library sx6119
-     * @comname Grove FM Receiver
+     * @comname FM Receiver
      * @altname SX6119 FM Receiver
      * @type sound
      * @man seeed
+     * @web http://wiki.seeed.cc/Grove-FM_Receiver/
      * @con gpio
      *
      * @brief API support for the SX6119-based Grove FM Receiver