Timer for tasks, servers autoupdating and other.

Added Timer - great package which will make periodic tasks to work.
Timer exposes "taskDone" event, which can be triggered when
task ends it's execution.

Added first periodic task - servers information updating. By
default it will execute every 10 minutes. Configurable thru
options.

Added new options pane: Servers updating. It controls all aspects
of servers updating thing. Master server address, servers
autoupdating checkbox and autoupdate timeout values are exposed
for now.

We're now on on 0.2.0-devel :).

Fixes #29.

requester/exported.go

@@ -15,17 +15,23 @@ import (
 
     // local
     "github.com/pztrn/urtrator/cache"
+    "github.com/pztrn/urtrator/configuration"
     "github.com/pztrn/urtrator/eventer"
+    "github.com/pztrn/urtrator/timer"
 )
 
 var (
     Cache *cache.Cache
+    Cfg *configuration.Config
     Eventer *eventer.Eventer
+    Timer *timer.Timer
 )
 
-func New(c *cache.Cache, e *eventer.Eventer) *Requester {
+func New(c *cache.Cache, e *eventer.Eventer, cc *configuration.Config, t *timer.Timer) *Requester {
     Cache = c
+    Cfg = cc
     Eventer = e
+    Timer = t
     fmt.Println("Creating Requester object...")
     r := Requester{}
     return &r