More efficient emacs combination keys.

To move the cursor around more quickly, you should avoid using keys like "pageup" "pagedown", "home" "end", because it will cause your hand to leave the standard typing position. Instead you should use the equivalent keys for them:
Like the following left keys all have an equivalent combo on the right, which are faster:
C-up ---> m - {
C-down --> M -}
C-left --> M - b
C-right --> M - f
home --> C - a
end --> C - e
pageup --> M - v
pagedown --> C - v