clean up non-ascii characters

clean.sh

# Run this in _posts, obviously
files=`find . -name "*.mkd"`
for file in $files; do
    sed -i 's/–/-/g' $file
    sed -i 's/ / /g' $file
    sed -i "s/’/'/g" $file
    sed -i "s/‘/'/g" $file
    sed -i 's/“/"/g' $file
    sed -i 's/”/"/g' $file
    sed -i 's/…/.../g' $file
done