Default value for `concealcursor` documentation incorrect

[paulkre]

The README states that this plugin uses the value "inc" for the concealcursor setting by default:

indentLine/README.md

Lines 77 to 82 in 7753505

	indentLine will overwrite your "concealcursor" and "conceallevel" with default value:
	```vim
	let g:indentLine_concealcursor = 'inc'
	let g:indentLine_conceallevel = 2
	```

But that would mean that on the line the cursor is on, all "conceal effects" would be removed, right? This is not the case when I use the plugin. I have to set concealcursor-=inc manually and then I have also have to set let g:indentLine_setConceal = 0 to make it work.

I understand why "inc" is not actually the default but this should be documented correctly to avoid confusion.

[paulkre]

Also, changing the value for indentLine_concealcursor does not seem to be working at all.