Added CustomizedTemplate.template_rel_path and renamed CustomizedTemplate.template_directory
to CustomizedTemplate.template_rel_directory.  Added unit tests to test
the custom_template.Loader constructor.

From: https://github.com/lucasb-eyer/pystache/commit/dd9184bb05d0b1001b30d61a0202de1273543316
Into: 'issue-93'

Objects that support iteration (i.e. implement __iter__), aside from
dictionaries, now behave like lists.

Conflicts:
	setup.py

v0.4.0 should now be ready to push to PyPI.

From: https://github.com/talos/pystache/commit/c8138f41c3a89523502d57d95f1da30c9d211b9e
Into: v0.4.0-prep

This is done by treating any object with __iter__ methods the way only
'list' and 'tuple' objects were treated before. Except dictionaries,
they have an __iter__ method too, but that's not what we want.

All 291 tests aswell as the new one pass.