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/bmp280/CMakeLists.txt

@@ -1,5 +1,5 @@
 set (libname "bmp280")
-set (libdescription "Bosch bmp280 Pressure sensor and bme280 humidity sensor")
+set (libdescription "Bosch Atmospheric Sensor Library (bmp280 and Bme280)")
 set (module_src ${libname}.cxx bme280.cxx)
 set (module_hpp ${libname}.hpp bme280.hpp)
 upm_module_init(interfaces mraa)

src/bmp280/bme280.hpp

@@ -42,7 +42,7 @@ namespace upm {
   /**
    * @library bmp280
    * @sensor bme280
-   * @comname BME280 Digital Humidity, Pressure, and Temperature Sensor
+   * @comname Digital Humidity, Pressure, and Temperature Sensor
    * @type pressure humidity
    * @man adafruit
    * @con i2c spi gpio

src/bmp280/bmp280.hpp

@@ -47,7 +47,7 @@ namespace upm {
   /**
    * @library bmp280
    * @sensor bmp280
-   * @comname BMP280 Digital Pressure Sensor
+   * @comname Digital Pressure Sensor
    * @type pressure
    * @man adafruit
    * @con i2c spi gpio