fix: pkg: replace python setup.py stance with pip install.

Upon some combination of platform, we could have strange errors.
Using ``pip`` seems now more than recommended.
 - https://stackoverflow.com/questions/30239152
 - http://naoko.github.io/your-project-install-pip-setup/
 - https://stackoverflow.com/questions/30306099

Signed-off-by: Valentin Lab <valentin.lab@kalysto.org>

.travis.yml

@@ -9,7 +9,7 @@ install:
   - if [ -e requirements.txt ]; then pip install -r requirements.txt ; fi
   - if [ -z "$DOVIS" -o "$PKG_COVERAGE" ]; then pip install coverage; fi
   ## getting test deps
-  - python setup.py develop easy_install "$(./autogen.sh --get-name)[test]"
+  - pip install -e .[test]
 script:
   - shyaml --version
   - bin/test

README.rst

@@ -47,9 +47,9 @@ available on the PyPI. So you should be able to run::
     pip install shyaml
 
 If you have downloaded the GIT sources, then you could add install
-the current version via traditional::
+the current version via::
 
-    python setup.py install
+    pip install .
 
 And if you don't have the GIT sources but would like to get the latest
 master or branch from github, you could also::