page d'accueil
exercise title edition
added score input
Added (un)published support
numeric check on score field : design still ugly
Merge branch 'dev' of https://github.com/INSA-4IF-SpecIFic/elif into dev

Conflicts:
	src/static/css/editor.css
Added save button to editor
Added save button to editor
Some changes in the template (+ dummy data)
Merge branch 'sandbox.python' into dev
Implements compilation.create()
Implements compilation.PythonCompilation() class
Implements model.exercise.Exercise.code_language member
Adds test test_cpp_in_c() in src/test_compilation.py
Merge branch 'dev' of github.com:INSA-4IF-SpecIFic/elif into dev

Conflicts:
	src/templates/exercise.html
Fixed some inconsistencies

ex: Using POST to get data, showing "Save" and "Publish" to normal users, etc.
Merge branch 'dev' of github.com:INSA-4IF-SpecIFic/elif into dev
Fixed bug in monitoring (showing wrong exercises)
Computes score from CPU and memory performance
Merge branch 'dev' of github.com:INSA-4IF-SpecIFic/elif into dev