Running as standalone - pavement.py serving_dir

[damienjadeduff]

Hi there,

Steps:

• Cloning thinkcspy onto Kubuntu 14.04
• Running the instructions in README.rst

Unexpected result:

File "/usr/local/lib/python2.7/dist-packages/runestone/__main__.py", line 83, in serve
  os.chdir(pavement.serving_dir)
AttributeError: 'module' object has no attribute 'serving_dir'

Temporary fix:

Add

serving_dir = "./build/"+project_name

at line 25 of pavement.py.

Thanks,