Configure own vim statusline.

Add:
	vimrc
		-add own statusline functions, StatusLine() and StatusLineNC(), which
		load a different statusline for active and inactive window splits.
		-StatusLine() has left-justified filename, readonly, git branch, and
		modified flags, and a right-justified filetype and percent position
		through the file.
		-StatusLineNC() has left-justified filename and modified flags.
		-add autocommands to call the appropriate function on WinEnter() and
		WinLeave()

Mod:
	vimrc
		-remove lightline statusline-pluign configuration dictionary.