ImportError: No module named lxml.html with 2.6 build?
https://travis-ci.org/gliptak/pandas/jobs/8002651
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ERROR: test_options_warnings (pandas.io.tests.test_yahoo.TestYahoo)

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Traceback (most recent call last):

File "/home/travis/virtualenv/python2.6_with_system_site_packages/lib/python2.6/site-packages/pandas-0.11.1.dev_e23f225-py2.6-linux-x86_64.egg/pandas/io/tests/test_yahoo.py", line 184, in test_options_warnings

(calls, puts) = aapl.get_options_data(month=month, year=year)

File "/home/travis/virtualenv/python2.6_with_system_site_packages/lib/python2.6/site-packages/pandas-0.11.1.dev_e23f225-py2.6-linux-x86_64.egg/pandas/io/data.py", line 521, in get_options_data

from lxml.html import parse

ImportError: No module named lxml.html
