readme.rst: Hotlinks the image so it can be shown in PyPI.
Adds util.format_size()
http.py: Increases buffer size to 10MB.
engine.py: Prints human friendly string stats.
network.py: Adds bandwidth meter.
Implements --progress to support progress bar or dot indicators.
recorder.py: Fixes print for Python 2.
http.Connection: __init__() supports buffer_size argument.
changelog: Adds 0.11 (progress bar, buffer size notes)
Merge branch 'develop'
Bumps version to 0.11.