Remove base16 in .zshrc

Using the standard solarized colorscheme, the base16 colors are
conflicting with my terminal.
This removes the base16 from my zshrc

Signed-off-by: Mattijs Korpershoek <mattijs.korpershoek@gmail.com>
Changed terminator default keybinding

Split focus keybinding were defaulted to meta+<arrow>.
This conflicts with my tmux configuration, so changing them to random
stuff.

Signed-off-by: Mattijs Korpershoek <mattijs.korpershoek@gmail.com>