[oe] bitbake-trunk python version dependency

[Richard Purdie]

I just looked at bitbake trunk again and it appears to be broken with
python 2.6. The reason is we made some nasty hacks to the SocketServer
to enable idle callbacks and these have predictably broken on us.

The nice thing is in 2.6 a feature was added which lets us do what we
need as standard rather than hacking it in.

The question is therefore whether we make 2.6 the minimum version and
have no hacks or have some horrible workarounds for 2.5.

Unless anyone seriously objects I'm going to go with 2.6 as the minimum
version for bitbake trunk. By the time trunk is usable, 2.6 should be
pretty widespread.

Note this does not affect the 1.8 series which still has python 2.4 as
its minimum version and will continue to do so.

Cheers,

Richard