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/rotary/CMakeLists.txt

@@ -1,5 +1,5 @@
 upm_mixed_module_init (NAME rotary
-    DESCRIPTION "Relay angle sensor"
+    DESCRIPTION "Rotary Angle Sensor"
     C_HDR rotary.h
     C_SRC rotary.c
     CPP_HDR rotary.hpp

src/rotary/rotary.hpp

@@ -46,6 +46,7 @@ namespace upm {
  * @altname Rotary Potentiometer
  * @type ainput
  * @man seeed
+ * @web http://wiki.seeed.cc/Grove-Rotary_Angle_Sensor/
  * @con analog
  * @kit gsk
  *