Global date check

app/models/plutus/asset.rb

@@ -67,10 +67,12 @@ def balance
     #   => #<BigDecimal:1030fcc98,'0.82875E5',8(20)>
     #
     # @return [BigDecimal] The decimal value balance
-    def self.balance
+    def self.balance( startDate = nil, endDate = nil )
       accounts_balance = BigDecimal.new('0')
       accounts = self.find(:all)
       accounts.each do |asset|
+        asset.start_date = startDate if startDate
+	asset.end_date   = endDate   if endDate
         unless asset.contra
           accounts_balance += asset.balance
         else

app/models/plutus/equity.rb

@@ -68,10 +68,12 @@ def balance
     #   => #<BigDecimal:1030fcc98,'0.82875E5',8(20)>
     #
     # @return [BigDecimal] The decimal value balance
-    def self.balance
+    def self.balance( startDate = nil, endDate = nil )
       accounts_balance = BigDecimal.new('0')
       accounts = self.find(:all)
       accounts.each do |equity|
+	equity.start_date = startDate if startDate
+	equity.end_date   = endDate   if endDate
         unless equity.contra
           accounts_balance += equity.balance
         else

app/models/plutus/expense.rb

@@ -67,10 +67,12 @@ def balance
     #   => #<BigDecimal:1030fcc98,'0.82875E5',8(20)>
     #
     # @return [BigDecimal] The decimal value balance
-    def self.balance
+    def self.balance( startDate = nil, endDate = nil )
       accounts_balance = BigDecimal.new('0')
       accounts = self.find(:all)
       accounts.each do |expense|
+	expense.start_date = startDate if startDate
+	expense.end_date   = endDate   if endDate
         unless expense.contra
           accounts_balance += expense.balance
         else

app/models/plutus/liability.rb

@@ -62,10 +62,12 @@ def balance
     # @example
     #   >> Plutus::Liability.balance
     #   => #<BigDecimal:1030fcc98,'0.82875E5',8(20)>
-    def self.balance
+    def self.balance( startDate = nil, endDate = nil )
       accounts_balance = BigDecimal.new('0')
       accounts = self.find(:all)
       accounts.each do |liability|
+	liability.startDate = startDate if startDate
+	liability.endDate   = endDate   if endDate
         unless liability.contra
           accounts_balance += liability.balance
         else

app/models/plutus/revenue.rb

@@ -67,10 +67,12 @@ def balance
     #   => #<BigDecimal:1030fcc98,'0.82875E5',8(20)>
     #
     # @return [BigDecimal] The decimal value balance
-    def self.balance
+    def self.balance( startDate = nil, endDate = nil )
       accounts_balance = BigDecimal.new('0')
       accounts = self.find(:all)
       accounts.each do |revenue|
+	revenue.start_date = startDate if startDate
+	revenue.end_date   = endDate   if endDate
         unless revenue.contra
           accounts_balance += revenue.balance
         else