Added basic docs for Helgrind, Lackey, CoreCheck.

Minor wibbles in AUTHORS.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@1170 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/AUTHORS b/AUTHORS
index 5940d60..13a7041 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -2,12 +2,12 @@
 Julian Seward, jseward@acm.org, is the main author.
 
 Nicholas Nethercote, njn25@cam.ac.uk, did the core/skin
-generalisation, and wrote Cachegrind.
+generalisation, and wrote Cachegrind and some of the other skins.
 
 readelf's dwarf2 source line reader, written by Nick Clifton, was
 modified to be used in Valgrind by Daniel Berlin.
 
-Michael Matz and Simon Hausmann modified in the GNU binutils
+Michael Matz and Simon Hausmann modified the GNU binutils
 demangler(s) for use in Valgrind.
 
 Dirk Mueller contrib'd the malloc-free mismatch checking stuff.