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/t6713/CMakeLists.txt

@@ -1,5 +1,5 @@
 set (libname "t6713")
-set (libdescription "Amphenol Telaire 6713 Series CO2 Module")
+set (libdescription "I2C/UART High Accuracy CO2 Sensor")
 set (module_src ${libname}.cxx)
 set (module_hpp ${libname}.hpp)
 upm_module_init(mraa interfaces)

src/t6713/t6713.hpp

@@ -37,10 +37,11 @@ namespace upm {
 /**
  * @library t6713
  * @sensor t6713
- * @comname Telaire 6713 Series CO2 Module
+ * @comname I2C/UART High Accuracy CO2 Sensor
  * @altname T6713
  * @type gaseous
  * @man amphenol
+ * @web http://amphenol-sensors.com/en/products/co2/co2-modules/3215-t6700
  * @con i2c
  * @if ico2sensor
  *