Install Python requirements in Travis environment.

Author: Paebbels

.travis.yml

@@ -1,6 +1,7 @@
 language: python
 
-install: skip
+install:
+  - pip3 install -U -r requirements.txt
 
 # if: tag IS present
 

doc/conf.py

@@ -12,7 +12,7 @@
 #
 import os
 import sys
-#sys.path.insert(0, os.path.abspath('.'))
+sys.path.insert(0, os.path.abspath('.'))
 sys.path.insert(0, os.path.abspath('..'))
 #sys.path.insert(0, os.path.abspath('../pyCallBy'))
 #sys.path.insert(0, os.path.abspath('_extensions'))