update test environments

Author: chfw

.travis.yml

@@ -12,6 +12,7 @@ python:
 install:
   - pip install git+https://github.com/chfw/pyexcel-io.git
   - pip install git+https://github.com/chfw/pyexcel.git
+  - pip install git+https://github.com/chfw/pyexcel-xls.git
   - python setup.py install
   - pip install -r tests/requirements.txt
 script:

tests/requirements.txt

@@ -3,4 +3,3 @@ rednose
 nose-cov
 python-coveralls
 coverage
-pyexcel