[dev] Customer telephonic support

[duck]

I have the need to track telephonic customer support. Expand Whups or 
create a new module? Has someone already do something on this?
Desired features:

    * track when a customer called and track the time spend on support
    * easy and fast customer search to find a customer as soon as he
      identifies
    * have a price list of type of support
    * support types: billable, free - bug solving
    * every customer has his own “free time” and sale (contract based)
    * reports
    * statistic
    * possibility to use Minerva to bill the customer for the support

Duck