Added new "payee" and "capture" directives

The payee directive allows for transformation of payee names during the
parsing of a Ledger file.  This means you can record the payee name in
one form, but always have it reported in another form.  The syntax is
(and will be):

payee PAYEE_NAME  REGEXP

or

payee PAYEE_NAME
  REGEXP1
  REGEXP2
  ...

The account directive sets the account automatically based on the payee
iff the base account name is Unknown.  For example, if you have a bunch
of transaction in Expenses:Unknown, you can assign accounts for several
automatically using:

account ACCOUNT_NAME  PAYEE_REGEXP

or

account ACCOUNT_NAME
  PAYEE_REGEXP1
  PAYEE_REGEXP2
  ...

1 files changed, 3 insertions, 0 deletions

diff --git a/src/mask.h b/src/mask.h
index 8c20e554..755a2229 100644
--- a/src/mask.h
+++ b/src/mask.h
@@ -74,6 +74,9 @@ public:
 
   mask_t& operator=(const string& other);
 
+  bool operator<(const mask_t& other) const {
+    return expr < other.expr;
+  }
   bool operator==(const mask_t& other) const {
     return expr == other.expr;
   }