Fatal warning during client installation

> Steps to reproduce:
pip install couchbase

> Expected output:

Downloading/unpacking couchbase
  Downloading couchbase-0.7.0.tar.gz
  Running setup.py egg_info for package couchbase

> Actual output:

Downloading/unpacking couchbase
  Downloading couchbase-0.7.0.tar.gz
  Running setup.py egg_info for package couchbase
    fatal: Not a git repository (or any of the parent directories): .git

> Tip:
def get_version():
    try:
        p = subprocess.Popen('git describe', stdout=subprocess.PIPE,
                             shell=True)
        version = p.communicate()[0].strip()
    except:
        version = ''
    return version