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/lp8860/CMakeLists.txt

@@ -1,5 +1,5 @@
 set (libname "lp8860")
-set (libdescription "LED lighting controller")
+set (libdescription "LED Lighting Controller")
 set (module_src ${libname}.cxx mraa-utils.cxx)
 set (module_hpp ${libname}.hpp)
 upm_module_init(mraa interfaces)

src/lp8860/lp8860.hpp

@@ -42,11 +42,12 @@ namespace upm
  *
  * @library lp8860
  * @sensor lp8860
- * @comname TI LP8860 LED lighting controller
+ * @comname LED Lighting Controller
  * @altname LP8860
  * @type light
  * @man ti
  * @con i2c
+ * @web http://www.ti.com/product/LP8860-Q1
  * @if ilightcontroller
  *
  */