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/grovewfs/CMakeLists.txt

@@ -1,5 +1,5 @@
 set (libname "grovewfs")
-set (libdescription "Grove water flow sensor module")
+set (libdescription "Water Flow Sensor")
 set (module_src ${libname}.cxx)
 set (module_hpp ${libname}.hpp)
 upm_module_init(mraa)

src/grovewfs/grovewfs.hpp

@@ -40,10 +40,10 @@ namespace upm {
   /**
    * @library grovewfs
    * @sensor grovewfs
-   * @comname Grove Water Flow Sensor
+   * @comname Water Flow Sensor
    * @type liquid
    * @man seeed
-   * @web http://www.seeedstudio.com/wiki/index.php?title=G1/2_Water_Flow_sensor
+   * @web http://wiki.seeedstudio.com/wiki/G1/2_Water_Flow_sensor
    * @con gpio
    * @kit eak
    * @deprecated This class is being replaced by WFS