[New-imc] slight change in categories of cities list

[evan at protest.net]

Just a note since we've added bombay/mumbai i've changed the category for
india to south asia. It's the generally accepted term for the region
including pakistan, india, nepal, bangladesh, and sri lanka. As there are
a couple new imc applications coming in from this region it seemed good to
rename the heading so it will grow with the network.

in solidarity,
evan