[mbpi] Fix giffgaff uk mvno apn settings

Details got from an end user.
[mbpi] Add O2 UK MMS settings

There was no MMS settings for O2 UK so adding an entry of some
settings that were found. Previously there were some O2 settings
under GiffGaff UK MVNO section.
Merge pull request #27 from tkenakka/giffgaff

Giffgaff UK (mvno) and O2 UK settings updated
[mbpi] Add O2 Germany MMS settings
[mbpi] Add T-Mobile Germany MMS settings
Merge pull request #28 from monich/o2_germany

Add O2 Germany MMS settings
Merge pull request #29 from monich/tmobile_germany

Add T-Mobile Germany MMS settings
[mbpi] Add T-Mobile USA MMS settings
Merge pull request #30 from monich/tmobile.us

Add T-Mobile USA MMS settings
[mbpi] Add TeleFinland settings

TeleFinland is a budget brand which uses Sonera Finland
network and settings.
Merge pull request #31 from tkenakka/telefin

[mbpi] Add TeleFinland settings
[mbpi] MMS proxy for Three (3) Sweden

DNS resolution doesn't work, need to use IP address.
Merge pull request #32 from monich/tre.se

MMS proxy for Three (3) Sweden