Aceptance test added for user to advocate complaint (WiP)
Defined steps have to be updated to address visual components via xpath
Superfluous routes dropped
User accessed to complaint signatures implementation.  It was hidden.
Some tests added regarding to this issue.
Preventing author to advocate a complaint and User to advocate complaint
twice
New route added to complaint controller for user to advocate a complaint
Intreface updated for it to support model
Preventing page reloading (WiP)
Ajax request added for it to update interface as fast as users advocates
a complaint and so avoiding refresh
JSON rendered object at advocating time updated to inform advocator list