Also added a test case.

The commit also adds a unit test for this case.

From: https://github.com/alex/pystache/commit/b2ae206d68961b8aef568ceaa3dd1274150ef23e
Into: issue_34

Fixed a bug which caused the unit tests related to rendering zeroes to fail
when using PyPy.  Using "is" to compare integers relies on an implementation
of CPython.  The operator "==" should be used instead.

Switched to using optparse from argparse, which is only available
starting in Python 2.7.

From: https://github.com/vrde/pystache/commit/4c22f137697c0a3437a6d867f44e958d6f6969f2
Into: issue_31

Added entry point to setup.py.  Skipped changes related to "partials can be passed
as a dictionary" because that was addressed as part of issue #47.

Conflicts:
	setup.py

From: https://github.com/vrde/pystache/commit/7667a95e285bbf162e2425045999e07b7bfea5f9
Into: issue_31

Adds command-line script: pystache/commands.py

Added test cases to check that View.template_path is respected.

Added a test case to load templates from a dictionary.

Also simplified the Template.load_template() method.