Renamed spi to spi.py
Add spi wrapper shell script
Add support for the new wrapper script in the Makefile
Update translations from transifex
Actually install the spi.py file
Add a wrapper script to set PYTHONIOENCODING

In order for the output to be piped through less or anything else, one
has to set PYTHONIOENCODING=utf-8 before launching the pythong
interpreter. Sadly this cannot be changed from within the python
environment, so we have to use a wrapper script to work around it.