Feature edit line timetable

[vpassama]

This PR is about issues :

• [Line Timetable ] timecard edit page + text block #64
• [Line Timetable ] timecard edition : add calendar block #66

It provides a default template for line timetable edition.

The code needs a new parameter from canal_tp_mtt configuration tree. (it was canal_tp_meth in DependencyInjection but I changed it, tell me if it's ok).

Example :

canal_tp_mtt:
    hour_offset: 4

This parameter has a default value declared in MttBundle (it is 4). It is used for many things :

• Requesting route_schedules service in navitia (you can ask the navitia developers if you want to know why)
• Building a referential date from provided hours
• Detecting day / day + 1 limit for trips and using layout_config hours limitations

If you need more details and/or examples, tell me and I'll add them.