Add note for the new Swedish account file

This is a follow up on bug https://bugzilla.gnome.org/show_bug.cgi?id=724427

accounts/sv_SE/Makefile.am

@@ -4,4 +4,5 @@ accountdir = ${GNC_ACCOUNTS_DIR}/sv_SE
 account_DATA = \
 	bas_2012.gnucash-xea 
 EXTRA_DIST = \
+  README.bas_2012 \
   ${account_DATA}

accounts/sv_SE/README.bas_2012

@@ -0,0 +1,15 @@
+Account plan for Sweden
+-----------------------
+
+These notes are taken from
+https://bugzilla.gnome.org/show_bug.cgi?id=724427
+and added here in case someone wants to look into some areas the
+original author was unsure of.
+
+* An advanced user with much knowledge about BAS might want to look over the
+  classification of the following accounts (but it should work as is too):
+
+  2510
+  2710--2790
+  8810--8850
+  8910--8999