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/at42qt1070/CMakeLists.txt

@@ -1,5 +1,5 @@
 set (libname "at42qt1070")
-set (libdescription "Module for the Atmel AT42QT1070 QTouch sensor")
+set (libdescription "Seven-channel QTouch Touch Sensor")
 set (module_src ${libname}.cxx)
 set (module_hpp ${libname}.hpp)
 upm_module_init(mraa)

src/at42qt1070/at42qt1070.hpp

@@ -43,11 +43,12 @@ namespace upm
 /**
  * @library at42qt1070
  * @sensor at42qt1070
- * @comname AT42QT1070 QTouch Sensor
+ * @comname Seven-channel QTouch Touch Sensor
  * @altname Grove QTouch Sensor
  * @type touch
  * @man seeed
  * @con i2c
+ * @web http://wiki.seeed.cc/Grove-Q_Touch_Sensor/
  *
  * @brief API for the Atmel AT42QT1070 QTouch Sensor
  *