Use fork of theme as base

Author: amitness

.travis.yml

@@ -9,7 +9,7 @@ install:
 - pip install -r requirements.txt
 - git config --global user.email "meamitkc@gmail.com"
 - git config --global user.name "Amit Chaudhary"
-- git clone https://github.com/amitness/Flex themes/Flex
+- git clone https://github.com/PythonNepal/pure-single theme
 - git clone https://github.com/getpelican/pelican-plugins
 script:
 - fab publish:"Build site"