refs #17: Adapt CI/RTD scripts to fit with our directory structure

.travis.yml

@@ -18,5 +18,6 @@ install:
   - cd python && pip install -r requirements-ci.txt
 
 # command to run tests
+# (we are already in "python" directory here)
 script:
-  - cd python && python -m pytest tests/
+  - python -m pytest tests/

python/requirements-docs.txt

@@ -1 +1,3 @@
--e .[tf,docs]
+# this is to be executed in RTD servers,
+# where the current working directory is fixed to the repository root.
+-e python[tf,docs]

python/setup.py

@@ -18,10 +18,12 @@
 # Used in developers' PCs only
 dev_requires = [
     'pytest-sugar',
+    'sphinx',
     'sphinx-rtd-theme',
 ]
 
 # Used in ReadTheDocs build servers
+# (actually they already have Sphinx, but let's specify it explicitly.)
 docs_requires = [
     'sphinx',
 ]