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/tm1637/CMakeLists.txt

@@ -1,5 +1,5 @@
 set (libname "tm1637")
-set (libdescription "C++ API for the TM1637 7-segment display")
+set (libdescription "C++ API for the TM1637 7-segment Display")
 set (module_src ${libname}.cxx)
 set (module_hpp ${libname}.hpp)
 upm_module_init(mraa)

src/tm1637/tm1637.hpp

@@ -52,10 +52,11 @@ namespace upm
 /**
  * @library tm1637
  * @sensor tm1637
- * @comname TM1637 7-Segment Display
+ * @comname 7-segment Display
  * @altname Grove 4-Digit Display
  * @type display
  * @man seeed
+ * @web http://wiki.seeed.cc/Grove-4-Digit_Display/
  * @con gpio
  *
  * @brief API for the TM1637 7-Segment Display