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/hmtrp/CMakeLists.txt

@@ -1,5 +1,5 @@
 set (libname "hmtrp")
-set (libdescription "Grove serial rf pro (hmtrp) module")
+set (libdescription "Serial RF Pro Module")
 set (module_src ${libname}.cxx)
 set (module_hpp ${libname}.hpp)
 upm_module_init(mraa)

src/hmtrp/hmtrp.hpp

@@ -52,11 +52,12 @@ namespace upm {
 /**
  * @library hmtrp
  * @sensor hmtrp
- * @comname Grove Serial RF Pro
+ * @comname Serial RF Pro Module
  * @altname HMTRP-433 HMTRP-470 HMTRP-868 HMTRP-915
  * @type wifi
  * @man seeed
  * @con uart
+ * @web http://wiki.seeed.cc/Grove-Serial_RF_Pro/
  *
  * @brief API for the HM-TRP Serial RF Pro transceiver
  *