Fix display when no time accounting and add ability yo configure recurrence

Hi,

This pull request add the ability to configure le quota recurrence. A new configuration option ```SupportQuota::Preferences::Recurrence``` allow you to specify if the quota is year or month based. You can also completly disable to recurrence. The default is monthly.

I've made an other modification too regarding the displaying of Avaibility and Contracted field even if no timeaccounting information exist for the current customer.

I hope this will.

Regards.