Better Y-axis ticks for byte formatted fields

[OmniaK87]

Kibana version:
4.5.1
OS version:
RHEL 6.7
Original install method (e.g. download page, yum, from source, etc.):
Download from page

Describe the feature:
This is a fairly simple feature request. When the visualizations are created, the y-axis tick marks are automatically created. Unfortunately when using the byte format on fields, the y-axis marks end up as very odd non-round numbers. For example when a sum of a byte field is plotted as a number we get very nice ticks at
50,000,000,000
100,000,000,000
150,000,000,000
200,000,000,000.
However when the field is made to be in byte format they end up as
0YB
46.57GB
93.13GB
139.7GB
186.26GB.

I understand that this is the difference between the bytes in base 10 tick marks, and their conversion to gibibytes and the like.

Can we fix this so that the tick marks set themselves to binary based byte friendly numbers so that they appear as 0gb, 50gb, 100gb, 150gb...?

[flash1293]

#114441 will fix this issue