Encoding for MightyText plugin of pidgin

MightyText is a plugin to send sms with phone, and the encodage is différent. With this update, you can send emoji to a phone with apple theme. :)
Rectify encodage for 263.png

I don't know why, this carcte have more hexadecimales...
Merge pull request #4 from Hernou/patch-1

added encoding for MightyText plugin