hg status: added options to select files by status. Added options -m, -a, -r and u to select files corresponding to status M, A, R and ? respectively. If none of these options are specified, files of all status will be shown.

#!/bin/sh

mkdir a
cd a
hg init
echo 123 > a
hg add a
hg commit -m "a" -u a -d "0 0"

cd ..
mkdir b
cd b
hg init 
echo 321 > b
hg add b
hg commit -m "b" -u b -d "0 0"

hg pull ../a
hg heads