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/tsl2561/CMakeLists.txt

@@ -1,5 +1,5 @@
 upm_mixed_module_init (NAME tsl2561
-    DESCRIPTION "Digital light sensor"
+    DESCRIPTION "Digital Light Sensor"
     C_HDR tsl2561.h
     C_SRC tsl2561.c
     CPP_HDR tsl2561.hpp

src/tsl2561/tsl2561.hpp

@@ -99,7 +99,7 @@ namespace upm {
 /**
  * @library tsl2561
  * @sensor tsl2561
- * @comname TSL2561 Light Sensor
+ * @comname Digital Light Sensor
  * @altname Grove Digital Light Sensor
  * @type light
  * @man seeed