By launching Python with a custom [PYTHONSTARTUP](http://docs.python.org/2/tutorial/interpreter.html#the-interactive-startup-file) file, it's possible to create a `pyspark` script that functions like the regular `python` script but creates a SparkContext when used interactively.  The master would be specified by setting the MASTER environment variable.

Unfortunately, we can't name this script `pyspark` because it will conflict with the `pyspark` directories.  Do you have any other naming suggestions?