Changed shebang line to invoke Python using '/usr/bin/env'
Added 'setup.py' script for building Thrift files, removed shell script.

Added a setuptools-based 'setup.py' script that allows the Concrete
Python library to be installed as a package (or built as an egg, or
any of the other standard setuptools options), instead of having
people update their Python path.

Updated README.md with new instructions.
Merge branch 'master' of github.com:hltcoe/concrete
Restored 'build-python-thrift.sh', updated 'setup.py' and README.
Merge pull request #37 from charman/master

Python library setup changes