bmp85.py: add simple example of new i2c read func

Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

diff --git a/examples/python/bmp85.py b/examples/python/bmp85.py
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+++ b/examples/python/bmp85.py
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+#!/usr/bin/env python
+
+# Author: Brendan Le Foll <brendan.le.foll@intel.com>
+# Copyright (c) 2014 Intel Corporation.
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE
+
+import mraa as m
+
+# this example will show the 'advanced' i2c functionality from python i2c
+# read/write
+
+x = m.I2c(0)
+x.address(0x77)
+
+# initialise device
+if x.readReg(0xd0) != 0x55:
+  print("error")
+
+# we want to read temperature so write 0x2e into control reg
+x.writeReg(0xf4, 0x2e)
+
+# read a 16bit reg, obviously it's uncalibrated so mostly a useless value :)
+print(str(x.readWordReg(0xf6)))
+
+# and we can do the same thing with the read()/write() calls if we wished
+# thought I'd really not recommend it!
+
+x.write(bytearray(b'0xf40x2e'))
+
+x.writeByte(0xf6)
+d = x.read(2)
+
+# WARNING: python 3.2+ call
+print(str(d))
+print(int.from_bytes(d, byteorder='little'))