Update .vimrc to fix slow O inserts(key code timeout)

from :help ttimeoutlen




> The time in milliseconds that is waited for a key code or mapped key                                                     sequence to complete.  Also used for CTRL-\ CTRL-N and CTRL-\ CTRL-G                                when part of a command has been typed.                                                                              Normally only 'timeoutlen' is used and 'ttimeoutlen' is -1.  When a                                                     different timeout value for key codes is desired set 'ttimeoutlen' to                                                   a non-negative number.




		ttimeoutlen	mapping delay	   key code delay
		   < 0		'timeoutlen'	   'timeoutlen'
		  >= 0		'timeoutlen'	   'ttimeoutlen'




> The timeout only happens when the 'timeout' and 'ttimeout' options
 tell so.  A useful setting would be




                :set timeout timeoutlen=3000 ttimeoutlen=100                                                                    




> (time out on mapping after three seconds, time out on key codes after
	a tenth of a second).