share php functions
Move features related code into functions lib
let listen the test web server on all addresses
Enforce timezone
Move load instances details into a function
Use a cache (using APC) for projects, branches, instances
Put all acceptance instances list in cache
Revert "let listen the test web server on all addresses"

This reverts commit ffd9852462d50d558ed6a56bd3d2e6b9ed1e81ec.
Add the ability to store the SCM branch associated to an acceptance instance
Add note about PHP/APC requirement
Add logs to debug the white page issue in production
The issue isn't with the cache
Use a foreach instead of while
Flush caches after edition (it won't work for all pages due to the fact that we are using a cache locally to each server)
Link to homepage on navbar title click
Display (+link) SCM branches in acceptance instances list page
Group feature branches by the usage or not in acceptance
Fix the scrolling issue with navbar in features branches list