new: dev: travis-ci
fix: python 2.6 re.sub compatibility

cannot pass flags keyword argument to re.sub
the workaround is to compile the regex first and then perform the
substitution
http://stackoverflow.com/a/17318220/1123985
fix: python 3 compat HTMLParser, iterator, import

fix compatibility with python 3:
- HTMLParser: now in html.parser module
- iterator: depleted after it is iterated. caused issues
with variables which were suppoed to be lists
- import : importing from relative directory include
explicit from . import x instead of import x
Merge branch 'master' into django

Conflicts:
	lib/html2hamlpy/html.py