ErikZalm/Marlin — pull request #877 by Nutz95 (2014-04-13 16:05:35+00:00)
Title: pull Request to Add beta 3950 1% thermistor table into marlin firmware

I bought a few of the 3950 1% thermistors from ebay and i saw people that had already implemented them inside their own thermistor tables.
I wanted to create a pull request so that this thermistor will be available on the firmware.

the thermistor caracteristics are the following:
R25℃ ;100KΩ±1%

B Value(R25/50℃)：3990K 1%
Dissipation Factor(mW/℃)：1.1~1.6 In still Air
Thermal Time Constant(S)：10~17 In Still Air
Operating temperature range： (-50~+260°C)
Dimension： 1.8mm Dia X4.1mm
Lead Length ：30mm

i found the table on the following blogs:
http://microfabricator.com/articles/view/id/531ad7e59aad9d3131000000/beta-3950-thermistor-table-for-marlin
and
http://cae2100.wordpress.com/2014/03/08/beta3950-thermistor-table-for-marlin/

Can you merge this change?
Thanks a lot!