doc: go1.6.txt: template.IsTrue, bufio.Scanner.Buffer

Change-Id: Iaa01d34caf09c12c017dc0379d4fe1d2cffd5340
Reviewed-on: https://go-review.googlesource.com/14728Reviewed-by: Rob Pike <r@golang.org>

doc/go1.6.txt

@@ -8,10 +8,12 @@ NaCl is no longer restricted to pepper_41 (https://golang.org/cl/13958/)
 
 API additions and behavior changes:
 
+bufio: add Scanner.Buffer (https://golang.org/cl/14599/)
 fmt: allow any integer type as an argument to the * operator (https://golang.org/cl/14491/)
 math/rand: add Read (https://golang.org/cl/14522)
 strconv: QuoteToGraphic (https://golang.org/cl/14184/)
 text/template: ExecError (https://golang.org/cl/13957/)
 text/template: trimming spaces (https://golang.org/cl/14391/)
 text/template: Funcs check names (https://golang.org/cl/14562/)
+text/template: IsTrue (https://golang.org/cl/14562/)
 time: allow one and two-digit days of the month during Parse (https://golang.org/cl/14123/)