[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
[mbpi] Airtel India MMS APN settings added
Merge pull request #33 from tkenakka/master

[mbpi] Airtel India MMS APN settings added