Fixed 'asrootpy' import in comments
'from rootpy.utils import asrootpy' -> 'from rootpy import asrootpy'
Now it is consistent with the changes to rootpy.
Merge pull request #219 from kreczko/master

Small fix in comments
fix path handling in docs/conf.py
Merge pull request #220 from ndawe/master

fix path handling in docs/conf.py
add Google Analytics tracking code
Merge pull request #221 from ndawe/master

add Google Analytics tracking code to docs
Merge remote-tracking branch 'upstream/master'