Kitkat: concatenate body of SMS if intent contains more than one.

If the receive intent gets more than one PDU passed only the first one was
handled, causing long SMS messages on Kitkat to get truncated after 160
characters. Concatenate the body of all received PDUs before handling the
content to avoid this.

Fixes issue #830.
clean up
Merge remote-tracking branch 'origin/translation'
update translation stats