[PATCH] Coldstart fix v2 and dynamic signal quality

[Per Hallsmark <per hallsmark t2data se>]

Hello,

Here's a patch to the MBM plugin making a nicer coldstart patch than v1 
(adding cleanup of allocations)
and dynamic signal quality via unsolicited responses (no need for polling)

We also get info about roaming active or not, is it possible to display 
somehow?
(not sure if the english cows sounds like swedish but here they roam, so 
why not a roaming cow vers a silent cow? :-D )

Regards,
Per