Add deprecation note to BMP085 code with pointer to new BMP085/180 sensor library.

Author: tdicola

Adafruit_BMP085/DEPRECATED.txt

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+This BMP085 sensor library has been deprecated in favor of a new version that supports both the Raspberry Pi and Beaglebone Black.
+
+You can find the new library with installation instructions at this github repository: https://github.com/adafruit/Adafruit_Python_BMP
+
+You can also find a tutorial on using this library at: https://learn.adafruit.com/using-the-bmp085-with-raspberry-pi/using-the-adafruit-bmp-python-library