Modify edges function
New test code
New test code
Rename libbvg to bvg
	modified:   python-interface/Makefile
	modified:   python-interface/setup.py
	modified:   python-interface/testinterface.py
	modified:   python-interface/testunittest.py
Rename python-interface to python
Rename python-interface to python
Rename python-interface to python
Rename libbvg to bvg
Allow streaming mode when offset step = 1
David's modified makefiles
Merge branch 'wei' into merge

Conflicts:
	python/Makefile
	python/bvg.pyx
	python/setup.py
	python/testinterface.py
	python/testunittest.py
Working merged version -- still may be missing a few things