Index repr uses np.printoptions for "...", consolidate with display.options

[ghost]

use max_seq_len, after setting default to close #3391.
also duplicate behaviour of "..." in other situations, rather then
always printing 6 items

[jreback]

@jtratner is this still relevant? moving to 0.14 (or close if its not)

[jtratner]

heh, I think I may have done this the wrong way in that MultiIndex repr PR (I just used max_rows and then if it was greater divided by two.) Not sure. I'm actually unclear on what this issue is.

[ghost]

The issue here was that due to history, the display code referenced np options rather then pandas options
(it was written before I put in the config system). Now, we have our own config system and the code
should reference it. I'm not sure if it's still relevent eiether, should have put in a code link.
Can always grep.

max_seq_len is the option to reference.

[jreback]

@cpcloud do you know what this issue is? keep open

[jreback]

we do this already