add license text
update compatible browsers
[py3k] fixed a relative import
[py3k] use io.StringIO on python3
[py3k] removed use of tuple unpacking (see PEP 3113)
Merge pull request #7 from garrison/py3k

Fixes for python3
fixed in memory file saving and base64 encoding for python 3
shuld work with any py3k
Merge pull request #10 from ramovsky/master

fixed in memory file saving and base64 encoding for python 3
Merge pull request #1 from jakevdp/master

Update from original