Renamed test_requirements in requirements_test to be more homogeneous
Renamed dev_requirements to requirements_dev
Isolated common requirements into requirements_common.txt #628

Also updated Makefile to use proper file on make install: requirements_dev
which contain specific tools for profiling that have only some use in
development environnement
Removed usage of adapt -> replaced by simple quotes
Added back django-appconf to requirements_common
Added nodejs packages to docs/installation
Put valid version of appconf
Renamed test_requirements to requirements_test into .travis.yml
Expanded docs/installation.rst with a production mode procedure
Added startredis & stopredis task into Makefile
Massive underline of a title in docs/installation.rst
Simplified installation process (in dev & prod mode)
Added Autoenv link definition to docs/intallation
Moved requirements
Removed duplicated dependancy
Moved settings
Update static paths
Added root requirements
Updated install guide
Merge branch 'support/isolate-server-requirements' into develop