respect_cursor_position option

When jumping along indents, it can get a little bit annoying that the current cursor position is taken into account. I know that this is a matter of taste, but personally, I prefer that the actual indent of the current line is deciding and not the amount of spaces before the cursor.

That's why I added a ```respect_cursor_position``` setting which is true by default (so, the existing default behavior is unchanged).

I added a describing comment to the sublime-settings file, but I don't know if it is very comprehensible. Feel free to improve it if you like.