Remove incompatible example files (X-Account) and update the README file

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@19655 57a11ea4-9604-0410-9ed3-97b8803252fd

doc/examples/README

@@ -25,27 +25,22 @@ wamu.qfx
     Washington Mutual checking account with debit card
 
 
-Guide to *.xac Files:
+Guide to *.gnucash Files:
 ---------------------
-Many of the *.xac files are from older versions of X-Accountant,
+Many of the *.gnucash files are from older versions of X-Accountant,
 and will cause a warning message to be displayed.  They are
 here to help ensure backwards-compatibility with older
 versions of GnuCash.  They should otherwise work just fine.
+currency_tree_xml.gnucash  reg_doc_example.gnucash  taxreport.gnucash
+currency_tree_xml.gnucash
+    A simple demo showing a book with accounts in multiple currencies.
+    This demo can be used to test the multi-currency features of
+    GnuCash.
 
-splitdemo.xac
-    A very simple demo showing a paycheck split into a bank deposit,
-    and a variety of taxes.
+reg_doc_example.gnucash
+    This is the demo file that is used in much of the documentation.
 
-trading.xac
-    A more complex demo showing a bank account, several stocks, 
-    and a margin account.
-
-trading2.xac
-    A demo, similar to the above, but also includes accounts showing
-    income taxes.  In particular, a paycheck is split up into several
-    pieces.
-
-taxreport.xac
+taxreport.gnucash
     A demo that can be used with the tax report to show income tax
     related income and expenses.