Fixing calculator hint to display correct definition of the constant T

(cherry picked from commit 2c8f82f0)

Conflicts:
	AUTHORS

AUTHORS

@@ -117,7 +117,6 @@ Javier Orts Peñarrocha <jorts@upv.es>
 Stephen Sanchez <steve@edx.org>
 Jim Abramson <jsa@edx.org>
 Chris Rossi <chris@archimedeanco.com>
-Carson Gee <x@carsongee.com>
 Oleg Marshev <oleh.marshev@gmail.com>
 Sylvia Pearce <spearce@edx.org>
 Olga Stroilova <olga@edx.org>

lms/templates/courseware/courseware.html

@@ -325,7 +325,7 @@ ${fragment.foot_html()}
                               <tr>
                                 <td>T</td>
                                 <td>=</td>
-                                <td>${_("freezing point of water in degrees Kelvin")}</td>
+                                <td>${_("Typical room temperature: 298.15 (Kelvin), same as 25C/77F")}</td>
                               </tr>
                               <tr>
                                 <td>q</td>